Standard Lemma guide

clast

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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  • /klæst/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • rhymes with -æst

1

noun

Meaning 1

a fragment of rock that was broken from a larger rock or rock unit.

Definition source: English Wiktionary via Wiktextract

Topics: geography, geology, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

(geology) a constituent fragment of a clastic rock

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: fragment

History

Etymology

Back-formation from clastic.