claustrum.
bolt (gate/door); key; bars (pl.), enclosure; barrier; door, gate, bulwark; dam; monastery, cloister (often pl.);
Meaning & usage
a bar, band, bolt
gate, door, bulwark
enclosure (confined space)
cloister (especially in plural)
portion of monastery closed off to laity
claustrum (thin lamina of grey matter in each cerebral hemisphere of the human brain)
Where this word comes from
From Proto-Italic *klaudtrom, from Proto-Indo-European *kleh₂ud- (“key, hook, nail”) + *-trom (“instrumental suffix”). Equivalent to claud- (“to close, enclose”) + -trum. Related to Latin clāvis (“key”), clāvus (“nail, peg”), claustra (“dam, wall, barricade, stronghold”). Cognate with Ancient Greek κλείς (kleís, “bar, bolt, key”), Old High German slioȥan (“to close, conclude, lock”), Old Saxon slūtan (“to close, conclude, lock”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.