Standard Lemma guide

clopen

adj · noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • klō′pən
  • Received-Pronunciation: /ˈkləʊ̯.pən/
  • Canada, General-American: /ˈkloʊ̯.pən/
  • Australian, New-Zealand: /ˈklɐʉ̯.pən/
  • Australian: /ˈkləʉ̯.pən/
  • Scotland: /ˈklo.pən/
  • India: /ˈkloː.pen/
  • rhymes with -əʊpən

1

adj

Meaning 1

Both open and closed.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: mathematics, sciences, topology

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

A pair of work shifts in which a worker works a closing shift one day and then works an opening shift the following day.

Definition source: English Wiktionary via Wiktextract

Examples

  • James is on vacation, so I've got to do a clopen this weekend to cover his shifts.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Etymology tree English closed Proto-Indo-European *upó Proto-Germanic *ub Proto-Germanic *upp Proto-Germanic *upanaz Proto-West Germanic *opan Old English open Middle English open English open blend English clopen Blend of closed + open.