aperture

ap·er·ture

noun \ˈap-ə(r)-ˌchu̇r, -chər, -ˌtyu̇r, -ˌtu̇r\

Definition of APERTURE

1

: an opening or open space : hole

2

a : the opening in a photographic lens that admits the light

b : the diameter of the stop in an optical system that determines the diameter of the bundle of rays traversing the instrument

c : the diameter of the objective lens or mirror of a telescope

Examples of APERTURE

1. We entered the cave through a narrow aperture.
2. The photograph was taken using a fast shutter speed and a large aperture.

Origin of APERTURE

Middle English, from Latin apertura, from apertus, past participle of aperire to open

First Known Use: 15th century

Related to APERTURE

Synonyms

hole, opening, orifice, perforation

Related Words

loophole; breach, break, chink, cleft, crack, cranny, crevice, cut, fissure, gash, notch, rent, rift, rupture, slash, slit, split, tear; slot, space; exit, mouth, outlet, pore, vent; entrance, inlet, intake; pinhole, pinprick, punch, puncture; airhole, armhole, buttonhole, keyhole, knothole, peephole, pothole, wormhole

Near Antonyms

fill, filler, filling, patch, plug, seal, stopper; barrier, blockage, obstacle, obstruction

Other Pictures (on film) Terms

daguerreotype, emulsion, fill, sepia, still, stop

Rhymes with APERTURE

amateur, armature, blackamoor, carrefour, carte du jour, coinsure, commissure, confiture, connoisseur, coverture, curvature, cynosure, embouchure, epicure, filature, forfeiture, garniture, geniture, green-manure, haute couture, immature, insecure, ligature, manicure, overture, paramour, pedicure, plat du jour, portraiture, prelature, premature, quadrature, reassure, Reaumur, reinsure, saboteur, sepulture, sequitur, signature, simon-pure, sinecure, soup du jour, tablature, temperature, to be sure, troubadour, white amur, Yom Kippur

ap·er·ture

noun \ˈap-ə(r)-ˌchu̇(ə)r, -chər, -ˌt(y)u̇(ə)r\   (Medical Dictionary)

Medical Definition of APERTURE

1

: an opening or open space

2

: the diameter of the stop in an optical system that determines the diameter of the bundle of rays traversing the instrument