Definition of fatten verb from the Oxford Advanced American Dictionary

 

fatten

 verb
verb
NAmE//ˈfætn//
 
[transitive, intransitive]fatten (somebody/something) (up)Verb Forms present simple I / you / we / they fatten
 
he / she / it fattens
 
past simple fattened
 
-ing form fattening
 
 
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to make someone or something fatter, especially an animal before killing it for food; to become fatter The piglets are taken from the sow to be fattened for market. She's very thin after her illness—but we'll soon fatten her up.Word Familyfat adjectivefatty adjectivefatten verbfattening adjective
See the Oxford Advanced Learner's Dictionary entry: fatten