plural of add

Third-person singular simple present indicative form of add

Third-person singular simple present indicative form of add on

(computing) A plug-in.

Third-person singular simple present indicative form of adde

Alternative form of add-on

(transitive) To incorporate (something extra, often an amount of money) into something else (often a bill). / (intransitive) To put an expansion onto a building, usually a home.

Obsolete spelling of add

Initialism of attention deficit disorder. / Initialism of accidental death and dismemberment.

(sometimes attributive) Something which can be appended to something else.