1. (v. t.) To make fat; to feed for slaughter; to make fleshy or plump with fat; to fill full; to fat.

2. (v. t.) To make fertile and fruitful; to enrich; as, to fatten land; to fatten fields with blood.

3. (v. i.) To grow fat or corpulent; to grow plump, thick, or fleshy; to be pampered.

acculturate add to advance aggrandize aliment ameliorate amend amplify augment batten become overweight better bloom blossom boom boost breast-feed breed bring forward broaden build build up civilize culture dress dry-nurse edify educate elevate emend engross enhance enlarge enlighten enrich exalt expand extend farm fat fatten up favor fecundify feed fertilize fill out flourish flower force-feed forward foster fructify gain weight gather flesh go straight grow grow fat grow thick hatch hike hike up impregnate improve improve upon incrassate increase inflate inseminate inspissate jack up jump up keep lactate lard lengthen lift make an improvement manure maximize meliorate mend nourish nurse nurture nutrify parlay pinguefy plump prolificate promote put on weight put up pyramid raise ranch rear refine upon reform run socialize straighten out stuff suckle thick thicken thrive transfigure transform up upgrade uplift wet-nurse