Dictionary.com

costly

[ kawst-lee, kost- ]
/ ˈkɔst li, ˈkɒst- /
Save This Word!
See synonyms for: costly / costlier / costliest / costliness on Thesaurus.com

adjective, cost·li·er, cost·li·est.
costing much; expensive; high in price: a costly emerald bracelet; costly medical care.
resulting in great expense: The upkeep of such a large house is costly.
resulting in great detriment: It was a costly mistake because no one ever trusted him again.
of great value; very valuable; sumptuous.
lavish; extravagant.
QUIZ
ARE YOU A TRUE BLUE CHAMPION OF THESE "BLUE" SYNONYMS?
We could talk until we're blue in the face about this quiz on words for the color "blue," but we think you should take the quiz and find out if you're a whiz at these colorful terms.
Question 1 of 8
Which of the following words describes “sky blue”?
Meet Grammar CoachWrite or paste your essay, email, or story into Grammar Coach and get grammar helpImprove Your Writing
Meet Grammar CoachImprove Your Writing
Write or paste your essay, email, or story into Grammar Coach and get grammar help

Origin of costly

First recorded in 1350–1400, costly is from the Middle English word costli. See cost, -ly

synonym study for costly

1. See expensive.

OTHER WORDS FROM costly

cost·li·ness, nouno·ver·cost·li·ness, nouno·ver·cost·ly, adjectiveun·cost·ly, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use costly in a sentence

British Dictionary definitions for costly

costly
/ (ˈkɒstlɪ) /

adjective -lier or -liest
of great price or value; expensive
entailing great loss or sacrificea costly victory
splendid; lavish

Derived forms of costly

costliness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
FEEDBACK