(computing, historical) Acronym of Disk Operating System, a family of disk-based operating systems. / (US) Initialism of Department of State.

(military) Initialism of date of service. / (military) Initialism of date of separation. / (computing, Internet) Initialism of denial of service. / (sciences) Initialism of density of states.

(auxiliary) A syntactic marker in a question whose main verb is not another auxiliary verb or be. / (auxiliary) A syntactic marker in negations with the indicative and imperative moods.

(UK, informal) A party, celebration, social function; usually of moderate size and formality. / (informal) Clipping of hairdo. / (chiefly fossilized) Something that can or should be done.

(music) A syllable used in solfège to represent the first and eighth tonic of a major scale.

(rare) Abbreviation of ditto.

The cardinal number occurring after el and before do one in a duodecimal system. Written 10, decimal value 12.

plural of do

(music) plural of do

Used other than figuratively or idiomatically: see do, it. / (colloquial) To be appealing or suitable. / (slang, chiefly used in the past tense) To do something exceptionally foolish or unacceptable.