optical

play
adjective op·ti·cal \ ˈäp-ti-kəl \

Definition of optical

1 :of or relating to the science of optics
2 a :of or relating to vision :visual
b :visible 1
  • optical wavelength
c :of, relating to, or being objects that emit light in the visible range of frequencies
  • an optical galaxy
d :using the properties of light to aid vision
  • an optical instrument
3 a :of, relating to, or utilizing light especially instead of other forms of energy
  • optical microscopy
b :involving the use of light-sensitive devices to acquire information for a computer
  • optical character recognition
4 :of or relating to optical art

optically

play \ˈäp-ti-k(ə-)lē\ adverb

Examples of optical in a Sentence

  1. The company manufactures microscopes, telescopes, and other optical instruments.

  2. an optical illusion that fools most people

Recent Examples of optical from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'optical.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of optical

1570

optical Synonyms

Synonyms
ocular, optic, visual
Antonyms
nonvisual
Related Words
seeing, sighted; focusing (also focussing)

OPTICAL Defined for English Language Learners

optical

play
adjective

Definition of optical for English Language Learners

  • : used to help a person see

  • : relating to or using light

  • : involving the use of devices that get information for a computer by identifying patterns of light


OPTICAL Defined for Kids

optical

play
adjective op·ti·cal \ ˈäp-ti-kəl \

Definition of optical for Students

1 :relating to the science of optics
2 :relating to seeing :visual
3 :involving the use of devices that are sensitive to light to get information for a computer
  • an optical scanner

Medical Dictionary

optical

play
adjective op·ti·cal \ ˈäp-ti-kəl \

medical Definition of optical

1 :of or relating to the science of optics
2 a :of or relating to vision :visual
b :using the properties of light to aid vision
  • an optical instrument
3 :of, relating to, or utilizing light
  • optical microscopy


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