Webster's Revised Unabridged Dictionary · 1913

frill

frill (fril) , intransitive verb

[Old French friller, from Latin frigidulus somewhat cold, dim. of frigidus cold; akin to French frileux chilly.]

1.
To shake or shiver as with cold; as, the hawk frills. — Johnson
2.
(Photography) To wrinkle; -- said of the gelatin film.

Frill , transitive verb

To provide or decorate with a frill or frills; to turn back. in crimped plaits; as, to frill a cap.

Frill , noun

[See Frill, v. i.]

(a)
(Zoology) A ruffing of a bird's feathers from cold.
(b)
(Zoology) A ruffle, consisting of a fold of membrane, of hairs, or of feathers, around the neck of an animal.
(c)
(Zoology) A similar ruffle around the legs or other appendages of animals.
(d)
(Zoology) A ruffled varex or fold on certain shells.
2.
A border or edging secured at one edge and left free at the other, usually fluted or crimped like a very narrow flounce.
3.
Something superfluous, such as an ornament, or an additional function on a device or in a system not essential to the basic operation. -- Commonly used in the phrase no frills, used adjectively to indicate a fully functional but economical device or service; as, an economical no-frills airline.