English Reference
adjective · noun

optic

adj. · n.
US /ˈɑptɪk/ UK /ˈɒptɪk/ op·tic

  1. 01 B2 Upper Intermediate Technical Medicine

    adj.relating to the eye or the sense of sight.

    adj.relating to the eye or the physiological process of vision.

    Simple

    The doctor examined the optic nerve to check for any signs of damage.

    In context

    The optic nerve serves as the primary conduit for visual information, transmitting electrical impulses from the retina directly to the brain's visual cortex.

    Usage

    Usually placed before the noun it modifies.

  2. 02 C1 Advanced British English

    n.a device attached to a bottle in a bar that measures a standard amount of alcohol.

    n.a proprietary device fitted to an inverted bottle in a commercial bar to dispense a precise, regulated volume of spirits.

    Simple

    The bartender reached for the gin bottle on the optic to pour a single shot.

    In context

    In many British pubs, spirits are dispensed via an optic to ensure compliance with strict weights and measures legislation.

    Teacher's tip

    This is a very specific British term; American speakers would likely refer to this simply as a 'pourer' or 'dispenser'.

  3. 03 C2 Proficiency HumorousArchaic

    n.a funny or old-fashioned way to say 'eye'.

    n.a jocular or archaic term for the eye.

    Simple

    He kept a sharp optic on the children while they played near the water.

    In context

    The old sailor fixed his weary optics on the horizon, searching for any sign of the approaching storm.

    Teacher's tip

    Only use this in a very playful or literary context; it sounds very strange in modern everyday conversation.

    eyepeeper
  4. 04 C1 Advanced Technical Science

    n.a lens or part of a tool like a telescope that works with light.

    n.an individual lens, mirror, or prism within a complex optical instrument.

    Simple

    The technician cleaned the optics of the microscope very carefully.

    In context

    High-end cameras require precision-engineered optics to minimize chromatic aberration and ensure sharpness across the entire frame.

Much of the internet already relies on light to carry information through fiber optic cables.

ScienceDaily· 11 Sept 2026

To do so, they examined the antennae and various brain regions of ants that had previously been observed, including the optic lobes and central brain regions.

Phys.org· 4 Sept 2026

Borrowed from Middle French optique or Medieval Latin opticus, from Ancient Greek ὀπτῐκός (optĭkós, “of or for sight”), from ὀπτός (optós, “visible”) + -ῐκός (-ĭkós, “-ic”, adjectival suffix).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Ancient Greek ὀπτῐκός
Level C1 · Advanced
Frequency Frequent
Updated