in bed

in bed

1. Physically in one's bed without necessarily being asleep. I was in bed for a week when I had the flu. I didn't have the energy to do much of anything. I like to spend some extra time in bed on Saturday morning, just relaxing and reading a book.
2. Asleep in one's bed. Jenna's in bed already—she had a rough week. Your brother was looking for you last night, but you were already in bed, and he didn't want to wake you.
3. Having sex. I can't believe I caught them in bed together! How am I supposed to keep this a secret?
See also: bed
Farlex Dictionary of Idioms.

in ˈbed

used to refer to sexual activity: What’s he like in bed? I caught them in bed together (= having sex).
See also: bed
Farlex Partner Idioms Dictionary
See also:
  • climb into (something)
  • fall out of bed
  • take to bed
  • take to your bed
  • make (one's) bed (up)
  • make bed
  • make bed (up
  • make one’s bed
  • make up (one's) bed
  • make up the bed
References in classic literature
It was daylight when we reached the Temple, and I went at once to bed, and lay in bed all day.
Great Expectations
They spent a week in bed under signs that said Hair Peace and Bed Peace.
CELEB PROTESTERS FACT OR FICTION; Halina Watts' Saturday down the showbiz rabbit hole; WATTS the GOSS
PARENTS who give their teenagers a hard time for lazing in bed should heed new research which suggests the teens only do it because they aren't getting enough sleep.
Teenagers aren't getting enough sleep
They will stay in bed for an extra hour and sign a petition opposing the proposed legislation.
'Bed tax' lie-in protest
Any young male hustlers who work Los Angeles's Santa Monica Boulevard should be in bed by this time on a Saturday morning--someone's bed, anyway.
SPEEDWAY TO STARDOM
It was while watching television in bed one night that the terrible call came through; we had been guffawing at a Mexican comedy, and Carmela was laughing even as she picked up the receiver; suddenly, tears were running down her cheeks and she was moaning, "Se murio mi Papacito."
Sister & brother, wife & lover: one man's family
Scientists believe that if you want to feel full of beans when you go back to work, then avoid lazy mornings in bed.
Lie-ins bad for sleeping