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Definitions

fatten

[fat-n] / ˈfæt n /
VERB
grow or make bigger; nourish
Synonyms
STRONGEST
augment broaden build up swell
STRONG
bloat coarsen cram distend expand feed fill increase overfeed plump spread stuff thicken thrive wax
WEAK
gain weight put flesh on put on weight round out
Antonyms
STRONGEST
decrease
STRONG
contract deflate deplete lose shrink
WEAK
thin undernourish

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.

Soybean Export Council, a trade group, opened a Beijing office in 1982 to spread the word about protein-packed U.S. soybeans used to fatten livestock.

From The Wall Street Journal • Nov. 7, 2025

He was a skinny teenager told to go to buy milkshakes to "fatten him up".

From BBC • Nov. 7, 2025

Wilson’s phalaropes feed and fatten up at Mono Lake before their migration to South America.

From Los Angeles Times • Aug. 22, 2025

But like all farmers know, the best way to fatten any animal is to feed it corn and grain — simple carbohydrates.

From Salon • Sep. 7, 2023

“In that new Chevy. But she’s expecting to feed you lunch before you go. It’s her last chance to fatten you up before you leave Mississippi” He grinned.

From "Mississippi Trial, 1955" by Chris Crowe