costly

adjective

cost·​ly ˈkȯs(t)-lē 

costlier; costliest

1

a

: commanding a high price especially because of intrinsic worth

costly gems

b

: rich, splendid

2

: made or done at heavy expense or sacrifice

a costly mistake

costliness noun

Synonyms

• big-ticket
• dear
• expensive
• extravagant
• high
• high-end
• high-ticket
• precious
• premium
• priceless
• pricey
• pricy
• spendy [chiefly Northwest]
• ultraexpensive
• valuable

Examples of costly in a Sentence

We use less costly materials in our products.

It was too costly to fix her car after the accident, so she decided to buy a new car instead.

They won the game, but their best player was injured, so it was a costly victory.

The decision to wait could be a costly mistake.

Recent Examples on the Web

That was always going to be costly, but nobody likely anticipated just how much. —Michael Smolens, San Diego Union-Tribune, 28 Apr. 2024

Buying a house is costlier than anytime in at least the last decade, with property buyers hit with the double whammy of rising mortgage rates and home prices, according to real estate company Redfin. —Khristopher J. Brooks, CBS News, 25 Apr. 2024

Word History

First Known Use

14th century, in the meaning defined at sense 1a

Kids Definition

costly

adjective

cost·​ly ˈkȯs(t)-lē 

costlier; costliest

1

: of great cost or value

costly furs

2

: gained at great expense or sacrifice

a costly victory

costliness noun