English Reference
conjunction · noun · adjective

seeing

conj. · n. · adj.
US /ˈsiɪŋ/ UK /sˈiːɪŋ/ see·ing UK spelling seeings

  1. 01 B1 Intermediate

    conj.you use this to give a reason for something, especially when you have just noticed a fact.

    conj.used as a subordinating conjunction to introduce a statement that explains or justifies a following action or decision.

    Simple

    Seeing it's such a nice day, why don't we walk to the park?

    In context

    Seeing that the primary witness has failed to appear, the judge has little choice but to grant a further adjournment.

    Usage

    Often followed by 'that', though 'that' is frequently omitted in speech.

    Pitfall
    Seeing that it's raining, so we should stay. Seeing that it's raining, we should stay.

    Do not use 'so' after 'seeing that'; the first clause already establishes the reason.

  2. 02 B2 Upper Intermediate

    n.the act of looking at or noticing something with your eyes.

    n.the process or instance of visual perception.

    Simple

    For many people, seeing is believing.

    In context

    The sudden seeing of the mountain peak through the clouds provided the hikers with a much-needed boost in morale.

  3. 03 C2 Proficiency Technical Science

    n.how clear and steady an image looks through a telescope, depending on the air.

    n.the quality of the observing conditions as affected by the turbulence of the Earth's atmosphere.

    Simple

    The seeing was poor tonight because of the high winds and heat.

    In context

    Astronomers prefer high-altitude observatories where the seeing is consistently stable, allowing for high-resolution imaging of distant galaxies.

    Usage

    Usually uncountable in this technical context.

  4. 04 B2 Upper Intermediate

    adj.having the ability to see; not blind.

    adj.possessing the faculty of vision; often used in compound phrases.

    Simple

    The charity provides seeing eye dogs for people who have lost their vision.

    In context

    The exhibition was designed to be accessible to both seeing and non-seeing visitors through the use of tactile displays.

Usage seeing people

He's a Moroccan man in his twenties and wants to emigrate to Europe - not least because he's been seeing lots of videos on Instagram that make the trip look easy.

BBC News· 14 Aug 2026

We weren’t just robbed of the opportunity of seeing our favourite bands in the flesh.

The Guardian· 14 Aug 2026

Etymology 1

From see + -ing.

Etymology 2

Probably an elision of "seeing that" or "seeing as".

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

This entry
Level C2 · Proficiency
Frequency Very common
Updated