a person connected with another by blood relationship or marriage

an animal or plant related to another by common descent

assessed or considered by comparison with something else; not absolute; comparative

the relative isolation of life in the country

existing only in connection with or measurable only by reference to something else, e.g. a standard

relative density

Supply is relative to demand

of a pronoun, adverb, etc: introducing a subordinate clause qualifying an expressed or implied antecedent

a relative pronoun

of a clause: introduced in this way by such a connective

a relative clause