To become expanded; spread out, unfold, enlarge, etc.
To increase in size or volume as a result of internal pressure; expand.
To supply with something essential for growth, maintenance, or operation:
To block (a passage); plug:
Without qualification; bluntly:
To put something into (a container, for example) to capacity or to a desired level:
To become augmented.
Find another word for fatten. In this page you can discover 32 synonyms, antonyms, idiomatic expressions, and related words for fatten, like: expand, swell, fill-out, gain weight, feed, stuff, prepare for market, plump, cram, fill and round one out.