name · noun · 18 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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Received-Pronunciation:/ˈkɑːs.tə/
General-American:/ˈkæs.tɚ/
US:Recorded audio is listed in the source snapshot.
Southern-England:Recorded audio is listed in the source snapshot.
rhymes with -ɑːstə(ɹ)
rhymes with -æstə(ɹ)
homophone: caster
CMU ARPABET:K AE1 S T ER0
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
name
Meaning 1
One of the Dioscuri
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
12
noun
Meaning 12
Alternative spelling of caster, especially in its senses
A pivoting roller attached to the bottom of furniture to allow it to be moved.
Definition source: English Wiktionary via Wiktextract
Usage: UK, especially
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
13
noun
Meaning 13
Alternative spelling of caster, especially in its senses
A container with a perforated cap for sprinkling its contents, especially salt, pepper, etc.
Definition source: English Wiktionary via Wiktextract
Usage: UK, especially
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
14
noun
Meaning 14
type genus of the Castoridae: beavers
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: genus Castor
Antonyms: none provided
Broader terms: mammal genus
15
noun
Meaning 15
a hat made with the fur of a beaver (or similar material)
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: beaver
Antonyms: none provided
Broader terms: fur hat
16
noun
Meaning 16
a pivoting roller attached to the bottom of furniture or trucks or portable machines to make them movable
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: caster
Antonyms: none provided
Broader terms: roller
17
noun
Meaning 17
a shaker with a perforated top for sprinkling powdered sugar
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: caster
Antonyms: none provided
Broader terms: shaker
18
noun
Meaning 18
a multiple star with 6 components; second brightest in Gemini; close to Pollux
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: Alpha Geminorum
Antonyms: none provided
Broader terms: multiple star
History
Etymology
From Ancient Greek Κάστωρ (Kástōr), from Ancient Greek κάστωρ (kástōr, “beaver”).
From Middle French castor, from Old French castor (“beaver”), from Latin castor (“beaver”), from Ancient Greek κάστωρ (kástōr), from Doric Greek κάστον (káston, “wood”).
Named from Greek mythology; see Castor and Pollux. The name pollux was given to another mineral with which it was always found.
Alternative spelling of caster, via cast + -or (the Latinate varient of -er).
Across languages
Translations
25 source translations are retained for this English entry.