Webster's Revised Unabridged Dictionary · 1913

Modify

Modify , transitive verb

[French modifier, Latin modificare, modificari; modus limit + -ficare (in comp.) to make. See Mode, and -fy.]

1.
To change somewhat the form or qualities of; to change a part of something while leaving most parts unchanged; to alter somewhat; as, to modify a contrivance adapted to some mechanical purpose; to modify the terms of a contract.
2.
To limit or reduce in extent or degree; to moderate; to qualify; to lower.
Of his grace He modifies his first severe decree. — Dryden