Made up of liquid or moisture, usually (but not always) water.
Of an object, etc.: covered or impregnated with liquid, usually (but not always) water.
Of a burrito, sandwich, or other food: covered in a sauce.
Of calligraphy and fountain pens: depositing a large amount of ink from the nib or the feed.
Of a sound recording: having had audio effects applied.
Of weather or a time period: rainy.
Using afterburners or water injection for increased engine thrust.
(slang) Of a person: inexperienced in a profession or task; having the characteristics of a rookie.
(slang, vulgar) Sexually aroused and thus having the vulva moistened with vaginal secretions.
(British, slang) Ineffectual, feeble, showing no strength of character.
(retronym) Permitting alcoholic beverages.
(archaic, slang) Refreshed with liquor; drunk.
Of a scientist or laboratory: working with biological or chemical matter.
Employing, or done by means of, water or some other liquid.
(euphemistic, slang) Involving assassination or "wet work".
(slang) Of a board or flop: enabling the creation of many or of strong hands; e.g. containing connectors or suited cards. (Compare dry).
(colloquial, dated, obsolete) Of a Quaker: liberal with respect to religious observance.
With a usual complement or consummation; potent.

(countable, uncountable) Liquid or moisture.
(countable, uncountable) Rainy weather.
(Australia, countable, uncountable) Rainy season. (often capitalized)
(British, UK, countable, derogatory, uncountable) A moderate Conservative; especially, one who opposed the hard-line policies of British Prime Minister Margaret Thatcher in the 1980s.
(colloquial, countable, uncountable) An alcoholic drink.
(US, colloquial, countable, uncountable) One who supports the consumption of alcohol and thus opposes Prohibition.
(countable, in-plural, uncountable) A tyre for use in wet weather.
(colloquial, countable, derogatory, uncountable) A weak or sentimental person; a wimp or softie.
(alt-of, alternative, countable, uncountable) Alternative form of wat (“stew or curry eaten in Ethiopia and Eritrea”).

(transitive) To cover or impregnate with liquid.
(intransitive, transitive) To make or become wet.
(transitive) To make (oneself, clothing, a bed, etc.) wet by accidental urination.
(transitive) To form an intermetallic bond between a solder and a metal substrate.
(informal, transitive) To celebrate by drinking alcohol.
(Multicultural-London-English, US, slang) To kill or seriously injure.
(alt-of, misspelling) Misspelling of whet.