(aviation) An agreement in which an airplane, including crew, maintenance and insurance, is leased to another organisation, usually for a short period of time.

A woman hired to suckle another woman's child. / (figuratively, by extension) Someone who treats someone else with excessive care.

(transitive) To act as a wet nurse (in either sense.)

(idiomatic) An ejaculation or orgasm while asleep, often accompanying an erotic dream. / (idiomatic, by extension) An exciting fantasy; a very appealing, ideal thing, person, or state of affairs.

(intransitive) To produce fluids from the sex organs as a result of sexual arousal during sleep; to have an erotic dream; (figuratively) to fantasize (about something, especially in a sexual way).

(Ireland, colloquial) to go for a drink, especially as part of a victory celebration or on St Patrick's Day.

A substance, such as a surfactant, that reduces the surface tension of a liquid, allowing it to spread across and penetrate the surface of a solid.

(idiomatic) A person who takes the fun out of a situation or activity, as by pessimism, demands, dullness, etc. / Used other than figuratively or idiomatically: see wet, blanket.

(dated) a condom.

(idiomatic) To urinate in one's bed (during sleep). / (euphemistic) To go bad, to fail. Often said of machines; a euphemism for shit the bed.