Definition of underside in English:



  • 1The bottom or lower side or surface of something.

    ‘the butterfly's wings have a mottled brown pattern on the underside’
    • ‘It does not seem too bad when you are driving over it, apart from the little stones that jump up and damage the underside of the car.’
    • ‘On the underside of his ruler was a list of all the Trig functions.’
    • ‘He deftly chipped the goalkeeper via the underside of the crossbar.’
    • ‘Sure enough, on examining the underside of the toast we discovered it was indeed covered in little black garlicky burnt bits.’
    • ‘But the flames quickly spread along the underside of the thatch and in less than two hours the whole building was gutted.’
    • ‘He was about 5ft 7in, with the start of a beard and a scar or mark on the underside of his forearm.’
    • ‘They are tough plastic hooks which are secured to table legs and the underside of tables, so people can attach their bags or coats to them.’
    • ‘By the next day her lips had swelled and turned the pale, pinkish hue of the underside of her tongue.’
    • ‘I've been quite enjoying the bearded look even though my beard is a bit strange: it pretty much only grows on the underside of my chin.’
    • ‘It is also a good time to clean the underside of the deck and remove grass clippings and leaves.’
    • ‘He can see crows nesting on the underside of tree branches, and leaves fluttering down to the sky.’
    • ‘There is also a rear loading ramp which forms the underside of the rear fuselage.’
    • ‘Seeds appear to have been produced on the underside of the leaf, with the leaf edges rolled over to form an enclosing chamber.’
    • ‘If you are able without bad consequence to examine the underside of a rattlesnake, do so.’
    lower side, underneath, undersurface, undercarriage, underpart, belly, underbelly
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    1. 1.1 The less favourable aspect of something.
      ‘the sordid underside of the glamorous 1980s’
      • ‘The right type of Englishman is comfortable dealing with the underside of places like this.’
      • ‘Do you think that folks are getting a lesson in civics or seeing the underside of politics?’
      reverse, reverse side, other side
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