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mid-15c., from Middle French comparatif, from Latin comparativus "pertaining to comparison," from comparat-, past participle stem of comparare (see comparison). Originally grammatical; general sense is from c.1600; meaning "involving different branches of a subject" is from 1670s. Related: Comparatively.
A form of an adjective indicating a greater degree of the quality that the adjective describes. Better is the comparative form of good; faster is the comparative form of fast; bluer is the comparative form of blue; more charming is the comparative form of charming. (Compare superlative.)