apertureap‧er‧ture /ˈæpətʃə $ ˈæpərtʃʊr/ noun [countable] 
Word Origin
Word OriginWORD ORIGINaperture
ExamplesOrigin:
1600-1700 Latin apertura, from aperire ‘to open’EXAMPLES FROM OTHER DICTIONARIES
Thesaurus- The box has 10 tiny apertures through which viewers can see 3-D images.
- The telescope has an aperture of 2.4 metres.
- As with telescopes, the larger the aperture the greater the light-grasp, but there are hazards too.
- Binoculars of this aperture cost a great deal of money.
- Her sculptures are hybrids of organic and machine forms: cylinders punctuated with round apertures and protuberances.
- I had to get the aperture right.
- Lightning flickered in the ragged aperture where the ground-floor staircase door had been.
- The three of them watched in breathless silence as the doors reached their maximum aperture.
Longman Language Activatora hole that goes through something► hole
1 formal a small hole or space in something2the small hole at the front of a camera, which can be made larger or smaller to let more or less light in when you take a photograph · The sheet was ancient and full of holes.· She stuck her finger through the hole.hole in · Troy looked through a hole in the fence at the garden next door.· A shaft of light came in through a hole in the corrugated iron roof.something has a hole in it · I can't wear my green shirt -- it has a hole in it.gaping hole (=a big hole) · They stared at the gaping hole in the wall.
► gap an empty space in the middle of something such as a wall or fence, especially because part of it is missing or broken: gap in: · The gate was locked but we managed to get through a gap in the fence.gap under: · The light was coming through a tiny gap under the door.gap between: · Sharon has a gap between her two front teeth.
► opening a hole that something can pass through or that you can see through, especially one which is at the entrance or top of something: · Bees come and go through a small opening at the bottom of the hive.· We zipped up the opening of the tent to stop the mosquitoes getting in.
► aperture a hole, especially one that allows light to pass through - use this especially in scientific and technical contexts: · The telescope has an aperture of 2.4 metres.
WORD SETS► Photographyaperture, nounblow-up, nounboom, nouncamera, nouncassette, nouncheesecake, nounclose-up, nouncomposition, nouncrop, verbdaguerrotype, noundarkroom, noundevelop, verbdeveloper, nounemulsion, nounenlargement, nounenlarger, nounexpose, verbexposure, nounfilm, nounfish-eye lens, nounfix, verbfixative, nounflash, nounflash bulb, nounflashgun, nounframe, nounglossy, noungrainy, adjectivehalftone, nounhighlight, nounhologram, nounlens, nounlight meter, nounmagic lantern, nounnegative, nounoverexpose, verbover-exposure, nounphoto, nounphoto-, prefixphoto booth, nounphotocall, nounphotocopier, nounphotograph, nounphotograph, verbphotographer, nounphotographic, adjectivephotosensitive, adjectivephotosensitize, verbphoto shoot, nounplate, nounPolaroid, nounpose, verbpose, nounprint, verbprint, nounprocess, verbreproduce, verbretake, nounretouch, verbshade, nounshot, nounshutter, nounshutterbug, nounsitting, nounslide, nounsnap, verbsnap, nounsnapshot, nounsoft focus, nounspeed, nounstereoscopic, adjectivesubject, nountelephoto lens, nounthread, verb3-D, adjectivetime-lapse, adjectivetransparency, nountripod, noununderexpose, verbunload, verbview, nounviewer, nounviewfinder, nounwide-angle lens, nounzoom lens, noun