1. separate into constituents or fractions containing concentrated constituents (Freq. 3) • Derivationally related forms: fractionation • Topics: chemistry, chemical science • Hypernyms: separate • Verb Frames: - Somebody ----s something 2. obtain by a fractional process • Derivationally related forms: fraction, fractionation • Topics: chemistry, chemical science • Hypernyms: separate • Verb Frames: - Somebody ----s something