(intransitive, transitive) To act as a detective; to try to discover who committed a crime, or, more generally, to solve a mystery.

(obsolete, uncountable) Slowness; laziness, sloth. / (rare, collective) A group of bears.

Marked by low quality; inferior; inadequate. / Raunchy or perverted in nature; tastelessly sexual. / Untrustworthy. / (dated, of fabric) Thin and flimsy.

(transitive) To cause (someone) to sleep. / (transitive) To help (someone) to bed; put to bed. / (transitive, figuratively) To render dormant.

(informal) A sleepy person. / The ruddy duck.

Used other than figuratively or idiomatically: see sleep, in. / (intransitive, idiomatic) To sleep late; to go on sleeping past one's customary or planned hour.

Alternative form of sleepyhead

(simile) To sleep very well, especially peacefully

To fall asleep / (idiomatic, figuratively) To be affected by paresthesia; to go numb. / (euphemistic) To die

plural of sleuth-hound