Disdainful indication that something is obvious; see duh.

Initialism of date of incident. / Initialism of digital object identifier.

(US) Initialism of Department of the Interior.

plural of DOI

A program of political and economic reforms initiated in Vietnam in 1986.

Synonym of hatchet man

(obsolete) A commander in charge of ten men. / The senior, or eldest male member of a group. / (colloquial) A leading light, or exemplar of a particular practice or movement.

plural of doyen

Alternative spelling of doily

A female doyen. / The senior or eldest female member of a group, especially one who is most or highly respected.