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Synonyms

costly

American  
[kawst-lee, kost-] / ˈkɔst li, ˈkɒst- /

adjective

costlier, costliest
  1. costing much; expensive; high in price.

    a costly emerald bracelet; costly medical care.

    Synonyms:
    high-priced, dear
  2. resulting in great expense.

    The upkeep of such a large house is costly.

  3. resulting in great detriment.

    It was a costly mistake because no one ever trusted him again.

  4. of great value; very valuable; sumptuous.

  5. lavish; extravagant.


costly British  
/ ˈkɒstlɪ /

adjective

  1. of great price or value; expensive

  2. entailing great loss or sacrifice

    a costly victory

  3. splendid; lavish

"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

Related Words

See expensive.

Other Word Forms

  • costliness noun
  • overcostliness noun
  • overcostly adjective
  • uncostly adjective

Etymology

Origin of costly

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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The desire to win on both sides fueled the costly projects.

From The Wall Street Journal

Within five years, Operation Breakthrough, the ambitious, but ultimately costly, delay-ridden and politically unpopular federal initiative that had propped up the Kalamazoo factory and eight others like it across the country, ran out of money.

From Los Angeles Times

That PR campaign about the country’s top dairy title was brutal, and costly — $23 million on California’s end.

From Los Angeles Times

Even with health insurance, cancer treatment can prove extremely costly for those in the US.

From BBC

Even in strong relationships, deviation creates noise—and noise is costly.

From The Wall Street Journal