In bed Definition 1 of 4Pro Tip 1/3Physical State Indicates someone is physically lying down in a bed, often for sleep or rest. She was still in bed at noon. Pro Tip 2/3Illness Indicator Suggests a person is unwell and needs to stay in bed to recover. He's been in bed with the flu for a week. Pro Tip 3/3Conveying Laziness Can imply laziness if someone remains in bed long after they wake up. Stop being lazy and get out of bed!