Pronunciation: (frak'shu-nāt"), [key]
—v.t., -at•ed, -at•ing.
1. to separate or divide into component parts, fragments, divisions, etc.
2. to separate (a mixture) into ingredients or into portions having different properties, as by distillation or crystallization; cause to undergo fractional distillation, crystallization, or the like.
3. to obtain by such a process.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.