considered in relation or in proportion to something else

the relative effectiveness of the various mechanisms is not known

denoting a pronoun, determiner, or adverb that refers to an expressed or implied antecedent and attaches a subordinate clause to it, e.g. which, who

(of major and minor keys) having the same key signature

(of a service rank) corresponding in grade to another in a different service

a person connected by blood or marriage

much of my time is spent visiting relatives

a relative pronoun, determiner, or adverb

a term or concept which is dependent on something else