Webster's Revised Unabridged Dictionary · 1913

Amplify

Amplify ({not transcribed}) , transitive verb

[French amplifier, Latin amplificare. See Ample, -fy.]

1.
To render larger, more extended, or more intense, and the like; -- used especially of telescopes, microscopes, etc.
2.
(Rhetoric) To enlarge by addition or discussion; to treat copiously by adding particulars, illustrations, etc.; to expand; to make much of.
Troilus and Cressida was written by a Lombard author, but much amplified by our English translator. — Dryden

Amplify ({not transcribed}) , intransitive verb

1.
To become larger. [Obsolete]
Strait was the way at first, withouten light, But further in did further amplify. — Fairfax
2.
To speak largely or copiously; to be diffuse in argument or description; to dilate; to expatiate; -- often with on or upon. — Watts
He must often enlarge and amplify upon the subject he handles. — South