(transitive) To cause to gain weight by means of feeding. / (intransitive) To become fat or fatter by gaining weight. / (transitive, figuratively) To make bigger; to expand.

Not fattening; slimming

In a fattening way.

(archaic) Third-person singular simple present indicative form of fatten

(archaic) second-person singular simple present form of fatten

The quality of being fattening.