(intransitive, business, management) To make a product or service more desirable or useful.

plural of add on

(business, management) Something that adds value; a benefit or enhancement.

(transitive, slang, dated, horse racing) To geld (a horse). / Used other than figuratively or idiomatically: see add, list. / (transitive) To consider as an additional example to an expansive list.

(idiomatic, chiefly Hong Kong) To make extra effort.

Community for Open Antimicrobial Drug Discovery

Alternative form of add fuel to the fire.

Used other than figuratively or idiomatically: see add, fuel, fire. / (idiomatic) To worsen a conflict between people; to inflame an already tense situation.

(dated) To offer one's opinion.

(idiomatic) To further a loss with mockery or indignity; to worsen an already unfavourable situation.