(dated, idiomatic, now chiefly India) Absolutely not; definitely no.

(UK, colloquial) fair enough

The practice of doing good; virtuousness, good conduct.

virtuous

A set of rules or guidelines that one has to follow in a particular situation; etymologically, a set of things that one should do or not do in such situation.

plural of leaving do

(computing) An application which allows software to run in protected mode, even though the host operating system runs only in real mode.

Alternative spelling of dos and don'ts

present participle of do out

plural of DOS extender