[ ahy-ris ]
/ ˈaɪ rɪs /
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noun, plural i·ris·es, ir·i·des [ir-i-deez, ahy-ri-]. /ˈɪr ɪˌdiz, ˈaɪ rɪ-/.
verb (used without object)
Movies. to begin or end a take or scene with an iris-in or iris-out, achieved by manipulation of an iris diaphragm on the camera or by editing the film.
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Origin of iris

1350–1400; Middle English <Latin Īris, īris<Greek Îris, îris rainbow, goddess of the rainbow, halo, iris flower or root, iridescent crystal; in some senses <New Latin <Greek: diaphragm of eye

Other definitions for iris (2 of 2)

[ ahy-ris ]
/ ˈaɪ rɪs /

a female given name.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use iris in a sentence

British Dictionary definitions for iris (1 of 2)

/ (ˈaɪrɪs) /

noun plural irises or irides (ˈaɪrɪˌdiːz, ˈɪrɪ-)
the coloured muscular diaphragm that surrounds and controls the size of the pupil
Also called: fleur-de-lys any plant of the iridaceous genus Iris, having brightly coloured flowers composed of three petals and three drooping sepalsSee also flag 3, orris 1, stinking iris
Also called: rainbow quartz a form of quartz that reflects light polychromatically from internal fractures
a rare or poetic word for rainbow
something resembling a rainbow; iridescence
short for iris diaphragm

Word Origin for iris

C14: from Latin: rainbow, iris (flower), crystal, from Greek

British Dictionary definitions for iris (2 of 2)

/ (ˈaɪrɪs) /

the goddess of the rainbow along which she travelled to earth as a messenger of the gods
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for iris

[ īrĭs ]

Plural irises irides (īrĭ-dēz′, ĭrĭ-)
The colored, muscular ring around the pupil of the eye in vertebrate animals, located between the cornea and lens. Contraction and expansion of the iris controls the size of the pupil, thereby regulating the amount of light reaching the retina.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Cultural definitions for iris

[ (eye-ris) ]

The colored membrane of the eye, surrounding the pupil, which by contracting and expanding regulates the amount of light that enters the eye.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.