(transitive, colloquial) To kill or end. / (transitive, colloquial) To exhaust, to tire out. / (transitive, colloquial) To damage or injure.

(grammar) a direct object / (US) a Doctor of Osteopathic Medicine / (sciences) dissolved oxygen / (dentistry) Initialism of disto occlusal.

(computing, Internet) A denial-of-service attack.

(transitive, computing, Internet) To commit a denial-of-service attack against.

(teaching) Director of Studies; someone in charge of the academic side of a school including training teachers and deciding course materials.

Used other than figuratively or idiomatically: see will, do. / (by ellipsis) Affirmative yes in response to an especially personal or direct request for the performance of some action.

Used directly after the verb have or have got. / Used after the verb have or have got and a pronoun or determiner. / Used after a pronoun or determiner without the verb have or have got.

plural of to-do

A fuss made over something. / A task that has been noted as one that must be completed, especially on a list.

Alternative spelling of dos; plural of do