A subordinate clause used as an adverb. An adverb clause may indicate time, place, cause, condition, concession, comparison, purpose, or result: Although he is usually quiet [concession], everyone listens to him when he speaks [time], because he makes goo

a clause, or a group of words with a subject and verb, that answers questions like how, when, where, and how much

a clause that functions as an adverb, usually describing the action of a sentence