Definition of dog days in US English:

dog days

plural noun

literary
  • 1The hottest period of the year (reckoned in antiquity from the heliacal rising of Sirius, the Dog Star).

    • ‘These things love the heat, and boy do they take off in the dog days of July / August.’
    • ‘This is arguably the most humane and sensible solution since it saves the players from two weeks of practice under the sweltering sun and heat during the dog days of summer in late July.’
    • ‘The club started off blazing hot, winning its first 13 games before hitting the skids during the dog days of summer, losing 19 of 21 in late July and early August.’
    • ‘It is August, the dog days of summer, the time of squeezing hands during beach barbecues and back-to-school sales.’
    • ‘The so-called dog days of summer - a muggy stretch from early July to early September - might also be called the season's bat days in the United States.’
    hot weather, hotness, warm weather, warmth, warmness, sultriness, closeness, mugginess, humidity, swelter
    View synonyms
    1. 1.1 A period of inactivity or sluggishness.
      ‘in August the baseball races are in the dog days’
      • ‘At this time of year, in the dog days of winter, it's really nice to perk up jaded taste buds by injecting a bit of zest into your cooking.’
      • ‘The dog days of January and February have set in.’
      • ‘We knew that because we played our medium to small sized stadium gigs during the dog days of the third Thatcher term.’
      • ‘Fortunately, even in the slow dog days of summer, quality rock music is an unstoppable force.’
      • ‘It comes to mind now because the 2001 season is about to enter the dog days, and while we don't know yet who the winners will be come October, we can identify the losers.’

Pronunciation

dog days

/ˈdôɡ ˈˌdāz//ˈdɔɡ ˈˌdeɪz/