fasten Definition

fasten
verb fastened, fastening

1. To make something firmly closed or fixed.

Thesaurus: secure, lock, fix, close, bind, batten, tighten, clasp, clamp, bolt, rivet, cinch; Antonym: release, loosen.
Form: fasten up (also)
2. To attach something to something else.

Example: fastened the rope to the mast
Thesaurus: join, combine, connect, unite, link, interlink, interlock; Antonym: separate, untie.
intr
3. To become fastened.
4. To be capable of being fastened.

Derivative: fastener
noun

A device that fastens something; a clasp or catch.
Thesaurus: buckle, hook, lock, clamp, tie, vise, grip, clasp, snap, bolt.

Etymology: Anglo-Saxon fæstnian.

Phrasal Verb: fasten on or upon something

To concentrate on it eagerly; to dwell on it.To focus (the eyes) on someone or something in a fixed or penetrating way.