Definitions for opticalˈɒp tɪ kəl

Random House Webster's College Dictionary

op•ti•calˈɒp tɪ kəl(adj.)

of, pertaining to, or applying optics.
Category: Optics
of or pertaining to the eye or sight.
Category: Ophthalmology
constructed to assist sight.
Category: Ophthalmology
dealing with or skilled in optics.
Category: Optics

Origin of optical:

1560–70

op′ti•cal•ly(adv.)

Princeton's WordNet

optical(adj)
of or relating to or involving light or optics
"optical supplies"
ocular, optic, optical, visual(adj)
relating to or using sight
"ocular inspection"; "an optical illusion"; "visual powers"; "visual navigation"
ocular, optic, optical, opthalmic(adj)
of or relating to or resembling the eye
"ocular muscles"; "an ocular organ"; "ocular diseases"; "the optic (or optical) axis of the eye"; "an ocular spot is a pigmented organ or part believed to be sensitive to light"

Kernerman English Learner's Dictionary

optical(adjective)ˈɒp tɪ kəl
relating to light or vision
optical engineering
opticalˈɒp tɪ kəl
a shape, picture, etc. that tricks your eyes into seeing sth

Wiktionary

optical(Adjective)
Of, or relating to sight; visual
optical(Adjective)
Designed to assist or enhance sight
A microscope is an optical instrument.
optical(Adjective)
Of, or relating to optics
Refraction is an optical effect.
optical(Adjective)
Of, or relating to visible light
Optical telescopes don't work when it is cloudy.
optical(Adjective)
Incorporating light-sensitive devices
An optical switch opens the door automatically.

Translations for optical

Kernerman English Multilingual Dictionary

optical(adjective)

of or concerning sight or what one sees

The two objects in the picture appear to be the same size, but this is just an optical illusion (= they are not actually the same size); microscopes and other optical instruments.