Entry 4 senses · 2 variants Webster, 1913

Amplify

/ăm'-pləf-īˌ/ · Am·pli·fy · IPA /ˈæm.plə.faɪ/

01 v. t. To render larger, more extended, or more intense, and the like; -- used especially of telescopes, microscopes, etc.

imp. & p. p. Amplified; p. pr. & vb. n. Amplifying

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

02 v. i. To become larger.

1.
To become larger.[Obs.]
“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.
“He must often enlarge and amplify upon the subject he handles.” — South.