What does fasten mean?
Fasten is a versatile English verb meaning to secure, attach, or join things together — whether by buckling a seatbelt, buttoning a coat, tying a knot, or nailing boards into place. At its core lies the idea of firmness: something fastened is held tightly and will not come loose easily. The word extends naturally beyond physical joining into figurative use, as when we say suspicion was fastened on a suspect or a speaker's gaze was fastened on the horizon. Derived forms include the nouns fastener and fastening, which name the devices — zips, clasps, bolts, buttons — that do the holding. Descended from Old English "fæstnian," built on "fæst" meaning firm, it belongs to a small family of English words, including "steadfast," all celebrating stability. Practical, concrete, and centuries old, fasten remains essential vocabulary for describing how the world holds itself together.
To close, secure, or attach something, or to join two things together, using a device such as a buckle, button, zip, knot, nail, or bolt.
"He fastened his coat against the cold wind."
Often followed by an object plus a preposition such as "to," "onto," or "together."
To direct or fix something abstract — such as attention, a gaze, blame, or responsibility — firmly upon someone or something.
"The committee fastened the blame squarely on the contractor."
Despite the spelling, the "t" in "fasten" is silent — and the word is a direct descendant of Old English "fæst," meaning firm, the same root that gives us "steadfast."
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of fasten
Fasten descends from the Old English verb "fæstnian," meaning to make firm or fix securely, itself built on the adjective "fæst" (firm, fixed). That adjective comes from the Proto-Germanic root *fastu-, meaning firm or tight, which also yields the modern word "fast" in its older senses of firmly fixed (as in "hold fast" and "steadfast"). The word has remained remarkably stable in form and meaning across more than a thousand years of English. Its Germanic cousins include related forms in other Germanic languages sharing the same root sense of firmness.
Related word forms
How fasten is actually used
Regular verb with inflected forms fastened/fastening; the past tense is always spelled "-ed" even though pronounced as a single syllable ending in /d/. Common in both everyday and technical registers, especially in safety instructions (aviation, motoring). British and American usage are essentially identical.
Easily confused with fasten
"Fatten" means to make an animal or person heavier or plumper, whereas "fasten" means to secure or attach something; they differ by a single letter but share nothing in meaning.