Definition of foam in English:



mass noun
  • 1A mass of small bubbles formed on or in liquid, typically by agitation or fermentation.

    ‘a beer with a thick head of foam’
    • ‘She poured a dollop into her hands and raked her fingers through her hair, lathering the shampoo into a thick white foam.’
    • ‘The ragged line of white foam bubbled and surged before it's fading power was overtaken by the next wave.’
    • ‘As a coffee shop, they offer all the extras you hope for, including lattes served in pre-warmed mugs decorated with thick drifts of creamy foam.’
    • ‘There is so much foam and fizz you can't see the water for all that froth.’
    • ‘I went back into the bathroom and found the tub filled with pink foam bubbles.’
    • ‘She massaged her shampoo into her hair and scalp until it created a thick, rich foam.’
    • ‘Waves cracked against the hull as the bow pushed through the icy foam, sending spray up across the deck.’
    • ‘Without warning, a mass of foam boiled to the surface just off the port bow.’
    • ‘In his sleep he was home under a coconut tree on the Savannah or at Maracas Beach feeling bubbles of foam curling up between his toes.’
    • ‘The waves sank in a general rush of foam, and for a moment the liquid was still.’
    • ‘Behind him, Tekan was quietly watching the water hit the side of the ship, before breaking into a multitude of bubbles and foam.’
    • ‘Boiling also agitates the water, increasing the amount of foam.’
    • ‘It's boiling over, and I rush over to sort it out, simultaneous covering the hob controls in sauce and washing up liquid foam.’
    • ‘We look at how we can extend the shelf life of beer and at improving foam - people equate freshness with a nice head of foam.’
    • ‘The molinillo was placed in the chocolate pot and agitated to form foam.’
    • ‘At the point where the waste water entered the brook, there is a thick layer of foam.’
    froth, spume, surf, spindrift, spray
    View synonyms
    1. 1.1 A mass of small bubbles formed from saliva or sweat.
      • ‘Their coats were dark with sweat, and streaked with white foam.’
      • ‘Bryce paused in his tooth brushing, bubbles of minty liquid foam dripping messily down his chin.’
      • ‘It growled low and deep, with foam bubbling from its mouth.’
      • ‘Snorts and harsh breaths from their mounts, not to mention the lather and foam built up, showed these two riders were headed somewhere, and fast.’
      • ‘A small opening in the corner of his lips let some saliva foam through.’
      • ‘The gauchos of Argentina wore chaps that hardened from the foam and sweat of the horse's body, causing them to walk with flexed knees.’
      • ‘The salt bubbled and hissed in its mouth, building to a thick, white foam.’
    2. 1.2 A liquid preparation containing many small bubbles.
      ‘shaving foam’
      • ‘He said the foam had the consistency of shaving foam, but much smaller, and is entirely harmless.’
      • ‘Instead of old-fashioned, high-dose liquid, doctors inject foam directly in to the swollen vein.’
      • ‘Speaking of which, please turn in all your unopened MRE's that have bubbles or are covered in foam.’
      • ‘They spray foam on the fire, but even in this controlled situation, it's not easy to put out.’
      • ‘For these, Baki lined an old grain bin on the property with insulating spray foam and installed a propane heater unit.’
      • ‘They make a decent café au lait that's served in a glass and topped with a thick, lip-sticking foam.’
      • ‘Rio skidded out of the kitchen, face covered in strange, thick white foam.’
      • ‘Doctor Mighty rolled over, grabbed one of the KryptoLites, and popped it open in a spray of foam.’
      • ‘As the couple left the church with huge smiles across their faces they were greeted with showers of confetti and children blew foam bubbles.’
      • ‘She coughed and sputtered at the thick foam, and suddenly remembered something else.’
      • ‘But the cake, shaped like a Reese's cup with a liquid center and curry-touched foam, is pure yum.’
      • ‘They spread a thick layer of foam over the forecourt and the blazing vehicles and used water jets to cool gas cylinders in a nearby storage area.’
      • ‘Victims are sprayed with coloured foam and dragged off stage.’
      • ‘The liquid foam expands very slowly and thus reduces the chance of damaging the wall from over-expanding.’
      • ‘DF200 can be deployed as a foam or liquid spray, with foam application being preferable in most instances.’
      • ‘You spray this foam on the handles of your current tools and then grip it as you would if using it in the garden.’
      • ‘‘I like the idea of putting in some of that exploding shaving foam so that when they opened up the capsule they would just get sprayed with foam,’ he said.’
      • ‘Spray foam still has a share, and structural metal has gone beyond the metal building image to cover all types of structures.’
      • ‘He expelled a spray of fine white foam which almost extinguished the great log fire in the corner of the snug.’
      • ‘Liquid foam is most often used in wall cavities or to seal air gaps in a home's envelope.’
    3. 1.3 A lightweight form of rubber or plastic made by solidifying liquid foam.
      as modifier ‘foam rubber’
      • ‘On top was a quarter-inch thick yellow urethane foam pad.’
      • ‘Imagine if you will, a tennis player's sweatband, slightly bigger and thicker, made of foam with a shiny cover.’
      • ‘A very large piece of foam, the so-called PAL ramp foam, fell off the tank.’
      • ‘Kachel said cast members do wear special kneepads made of foam compressed to a quarter-inch inch thick so as not to show under their unitards.’
      • ‘Upon opening the tin, I found the walls of the tin neatly lined with thick foam, with an indentation for the mouse pad.’
      • ‘It'd be a good idea to back the rubbers up with some foam.’
      • ‘Plastic, foam or rubber thongs are completely casual, but can be worn off the beach nonetheless.’
      • ‘Second, firm closed-cell foam inside the belt is better than squishy foam because it rebounds better over time.’
      • ‘Opening the box, the first thing you will see is the card itself wrapped in a thick static protection bag and placed in shaped white foam.’
      • ‘Until the Columbia accident, the part was protected from ice buildup using thick sheets of foam.’
      • ‘Thick foam, gel pads, and extra linen increase the distance between the patient and electrode and should not be used.’
      • ‘A piece of dry foam rubber or foam plastic, rubbed over the garment, will usually take them off.’
      • ‘Thick foam padding protects the guns and the tough nylon exterior makes for easy transportation.’
      • ‘Its molded plastic yoke, backed with thick foam padding, wraps around the shoulders and attaches to golf bags in one of two places.’
      • ‘Hand-sand smaller or irregular areas with a rubber or foam sanding block.’
      • ‘Once the rubber and mounting foam have been cut, the stamps are glued to a wooden mound and are ready to impress!’
      • ‘Fambeau's new SafeShot bow case has thick eggshell foam.’
      • ‘Utilizing two inch thick foam, you'll need to stack two pieces in the cavity to make up the necessary four inches of total thickness.’
      • ‘The tank will no longer have thick foam insulation on the spot where it tore off Columbia at liftoff.’
      • ‘The pad is three inches thick, a third of which is closed-cell foam.’
    4. 1.4the foamliterary The sea.
      ‘Venus rising from the foam’


[no object]
  • Form or produce a mass of small bubbles; froth.

    ‘the sea foamed beneath them’
    ‘pints of foaming bitter’
    • ‘A life that bubbled and foamed with excitement and humor.’
    • ‘The tub is slick, and with lots of slippery bubbles foaming up from the jets, you'd best watch your step.’
    • ‘Kneer said he looked out of his window Friday morning to see suds foaming over the bank.’
    • ‘It fizzed; it foamed; it had all the trappings of a real experiment.’
    • ‘I wasn't thrashing and foaming and squawking like the others.’
    • ‘And now the Thames, like the Tiber, is foaming with much blood.’
    • ‘He had never seen anything like it, this barrier of blue and white that boiled and roared and foamed before him, like a thing alive.’
    • ‘Rain foamed on the hotel's harbour side lawn and produced a bank of hanging mist opaque as hill fog.’
    • ‘Squirt a little bit of washing up liquid into the cup, fill again with hot water so that the detergent foams.’
    • ‘You spray it in a big gap, and it sort of foams up dramatically in order to fill said aperture.’
    • ‘She saw the boats pulling away from the docks and the water foamed and bubbled beneath them.’
    • ‘Stir and set aside for 5 or 6 minutes, until mixture bubbles and foams.’
    • ‘He's on his way out, and, rabid dog that he is, it's no great surprise he's going out foaming all the way.’
    • ‘The mean person foams in the mouth, lolls around for 5 seconds, and passes out.’
    • ‘Add the olive oil to the pan and, when you can feel a good heat rising, slip in the butter and swirl it in the pan as it foams and melts.’
    • ‘However, as the water hit them, they emitted a terrible high-pitched screech and began to bubble, foam, and disintegrate on the spot.’
    • ‘The white-flecked ones, foaming as they crest, are the angrier-looking.’
    • ‘He foamed and fulminated, raging against Temby and his excesses.’
    • ‘An elderly man rolled up his trousers and paddled in the sea, chuckling as the water foamed and tickled at his ankles.’
    • ‘It has the insignia of Prydyn, the sea foaming around the sword, along with a heart.’
    froth, froth up, cream, bubble, fizz, effervesce, spume, lather, ferment, rise, boil, seethe, simmer
    View synonyms


  • foam at the mouth

    • informal Be very angry.

      • ‘Bianca was beside herself, still cuffed, doing everything but foaming at the mouth.’
      • ‘Meanwhile, back at the ranch, the academy foams at the mouth.’
      • ‘I don't know about you, but I'm foaming at the mouth and ready to throw down.’
      • ‘Anyway, this is supposed to get us all foaming at the mouth with indignation but quite frankly this law doesn't make any sense.’
      • ‘Ed Harris is angry and foaming at the mouth as Moss, a man who seems to be traveling down the same road as Shelley.’
      • ‘‘Alex was foaming at the mouth - he had lost it completely - and he frightened a lot of people that night,’ recalled Yates.’
      • ‘This is a member of a family that foams at the mouth against school vouchers and school testing.’
      • ‘But you'd also have Dobinson, a 44-year-old, foaming at the mouth.’
      • ‘That's why their foaming at the mouth over a tasteless stand-up act is pure demagoguery.’
      • ‘He plays like a rabid dog, always foaming at the mouth.’
      irate, annoyed, cross, vexed, irritated, exasperated, indignant, aggrieved, irked, piqued, displeased, provoked, galled, resentful
      View synonyms


Old English fām (noun), fǣman (verb), of West Germanic origin; related to Old High German feim (noun), feimen (verb).