Wait v. i. : To watch; to observe; to take notice.

Wait v. i. : To stay or rest in expectation; to stop or remain stationary till the arrival of some person or event; to rest in patience; to stay; not to depart.

Wait v. t. : To stay for; to rest or remain stationary in expectation of; to await; as, to wait orders.

Wait v. t. : To attend as a consequence; to follow upon; to accompany; to await.

Wait v. t. : To attend on; to accompany; especially, to attend with ceremony or respect.

Wait v. t. : To cause to wait; to defer; to postpone; -- said of a meal; as, to wait dinner.

Wait v. i. : The act of waiting; a delay; a halt.

Wait v. i. : Ambush.

Wait v. i. : One who watches; a watchman.

Wait v. i. : Hautboys, or oboes, played by town musicians; not used in the singular.

Wait v. i. : Musicians who sing or play at night or in the early morning, especially at Christmas time; serenaders; musical watchmen.

Example:
How long should I Wait before taking a marijuana drug test?

Taxonomy
Merriam-Webster Online Dictionary, Dictionary, webster, Word Games, waiter, expectation, delay, Webster Online Dictionary with audio pronunciations, transitive verb, meal, evidence, Handbook, Middle English, Old English, glossary, english, language, ESL.

Defination from the web:
wait from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... usage American dialectologists have evidence showing wait on (sense 3) to be more a Southern than a Northern form in speech. ...