relative

Concise Oxford English Dictionary © 2008 Oxford University Press:
relative /ˈrɛlətɪv/

▶adjective

• 1 considered in relation or in proportion to something else: the relative effectiveness of the mechanisms is not known.

  ■ existing or possessing a characteristic only in comparison to something else.

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

  ■ (of a clause) attached to an antecedent by a relative word.

• 3 Music (of major and minor keys) having the same key signature.

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

▶noun

• 1 a person connected by blood or marriage.

  ■ a species related to another by common origin.

• 2 Philosophy a term or concept which is dependent on something else.

– phrases
relative to

• 1 compared with or in relation to.

• 2 about; concerning.

– derivatives
relatival /-ˈtʌɪv(ə)l/ adjective,
relatively adverb.