English Reference
noun · adjective

opening

n. · adj.
US /ˈoʊpənɪŋ/ UK /ˈəʊpənɪŋ/ open·ing UK spelling opening's, opening's

  1. 01 B1 Intermediate

    n.a hole or space that something can pass through.

    n.an aperture or gap that permits passage or visibility.

    Simple

    The cat squeezed through a small opening in the garden fence.

    In context

    The climbers discovered a narrow opening in the rock face that led to a hidden cavern system.

  2. 02 B1 Intermediate

    n.the beginning of a show, ceremony, or story.

    n.the initial part or commencement of a performance, event, or literary work.

    Simple

    The opening of the new art gallery attracted hundreds of visitors.

    In context

    The novel's dramatic opening immediately establishes a sense of tension that persists throughout the first three chapters.

  3. 03 B2 Upper Intermediate

    n.a job that is available for someone to start.

    n.a vacant position or opportunity for employment within an organisation.

    Simple

    The company has an opening for a junior designer in the marketing team.

    In context

    Although the firm is currently downsizing, they have kept one opening available for a specialist in international law.

  4. 04 C2 Proficiency Technical Math

    n.a specific way of changing a shape in computer math.

    n.the dilation of the erosion of a set, used to remove small objects or noise from an image.

    Simple

    The engineer used an opening to clean up the digital image.

    In context

    Applying an opening to the binary image effectively eliminated the salt-and-pepper noise without significantly altering the larger structural components.

  5. 05 B1 Intermediate

    adj.happening at the very beginning of something.

    adj.pertaining to the start or first stage of a series of events or a period of time.

    Simple

    The opening scene of the movie was filmed in London.

    In context

    The opening remarks of the conference set a collaborative tone for the subsequent panel discussions.

Usage opening the door · opening new · opening day

For example, in the opening scene, Theseus’s “earthlier happy is the rose distill’d” becomes “happier is the rose plucked for perfume”.

The Guardian· 14 Aug 2026

And there is a man sitting at a desk, welcoming us to the theatre and opening a folder.

The Guardian· 13 Aug 2026

Etymology 1

From Middle English openynge, openande, openand, from Old English openiende, from Proto-West Germanic opanōndī, from Proto-Germanic upanōndz, present participle of *upanōną (“to open”), equivalent to open + -ing. Cognate with West Frisian iepenjend, Dutch openend, German öffnend, Swedish öppnande, Icelandic opnandi.

Etymology 2

From Middle English openyng, openynge, openunge, from Old English openung (“an opening”), from Proto-West Germanic opanungu, from Proto-Germanic upanungō (“an opening”), equivalent to open + -ing. Cognate with Saterland Frisian Eepenge, Epenge (“an opening”), West Frisian iepening (“an opening”), Dutch opening (“an opening”), German Öffnung (“an opening”), Danish åbning (“an opening”), Swedish öppning (“an opening”).

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

This entry
Origin gem-pro *upanōndz
Level B2 · Upper Intermediate
Frequency Very common
Updated