adj · noun · 4 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:/ˈkɒst.li/
US:Recorded audio is listed in the source snapshot.
CMU ARPABET:K AA1 S T L IY0
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
CMU ARPABET 2:K AO1 S T L IY0
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
adj
Meaning 1
Of high cost; expensive.
Definition source: English Wiktionary via Wiktextract
Examples
a costly activity
a costly error
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
Short for costly colours.
Definition source: English Wiktionary via Wiktextract
Usage: abbreviation, alt-of, uncountable
Topics: card-games, games
Examples
Costly is a simpler game than cribbage.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
adjective satellite
Meaning 3
having a high price
Definition source: Princeton WordNet 3.0
Examples
costly jewelry
high-priced merchandise
much too dear for my pocketbook
a pricey restaurant
Meaning relationships
Synonyms: dear(p), high-priced, pricey, pricy
Antonyms: none provided
4
adjective satellite
Meaning 4
entailing great loss or sacrifice
Definition source: Princeton WordNet 3.0
Examples
a dearly-won victory
Meaning relationships
Synonyms: dearly-won
Antonyms: none provided
History
Etymology
From Middle English costly, costely, costeley, equivalent to cost + -ly.
Across languages
Translations
41 source translations are retained for this English entry.