• 1[predicative] (of a person) present at one's home or office.

    ‘we knocked at the door but there was no one in’
    • ‘I've only been in for five minutes and I stumble across a wedding party.’
    • ‘Suffice it to say that his press conferences have all the allure of a night in with the prime minister.’
    • ‘It is now 10:00 am, and I've only been in for about 20 minutes.’
    • ‘The lads upstairs were having a sports night in with, I suspect, more than a few beers.’
    • ‘I'm not in on Monday.’
    • ‘He does little else; his idea of a good time is a night in with some scouting reports.’
    present, home, at home
    View synonyms
  • 2informal Fashionable.

    ‘pastels and light colors are in this year’
    ‘the in thing to do’
    • ‘This year, monochromatic colors are the in thing.’
    • ‘In addition to statement T-shirts, graphic T-shirts are in this year.’
    • ‘Way back when beards were in, mawkish mystics brought forth the concept album.’
    • ‘Luigi's was a large and crowded restaurant that was clearly the in place for the in-crowd.’
    • ‘The very in words are slammin' and rockin'.’
    • ‘He even let his membership lapse at Au Bar, the in club.’
    fashionable, in fashion, in vogue, voguish, stylish, in style, Popular, up to the minute, modern, modish, trendsetting, chic
    View synonyms
  • 3[predicative] (of the ball in tennis and similar games) landing within the designated playing area.

    • ‘Before I even came off the pick, I felt the shot was in.’
    • ‘I don't think I got any first serves in today.’
    • ‘As you can see, I held my finish and barely looked up even as the ball went in.’