Modification \Mod`i*fi*ca"tion\, n. [L. modificatio a measuring: cf. F. modification. See Modify.]

The act of modifying, or the state of being modified; a modified form or condition; state as modified; a change; as, the modification of an opinion, or of a machine; the various modifications of light. --Bentley.

Source: Webster's Revised Unabridged Dictionary (1913)