costly
/ˈkɒst.li/
Proposed by a contributor, not yet supported by evidence.
Also seen as: costlier · costliest
Meaning · English
Of high cost; expensive.
Adjective
Examples
a costly activity
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Common questions
What does “costly” mean?
Of high cost; expensive.
Is “costly” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.