Indicates that an area should not be entered, e.g. a military installation, or as a sign on a hotel room door.

(euphemistic) To have sex. / Used other than figuratively or idiomatically: to do a given deed.

(obsolete) To take off (clothing). / (slang) To kill, to bump off

(linguistics) The use of the auxiliary verb "do" in negative or interrogative English sentences that do not contain other auxiliaries.

(colloquial, humorous) Used to indicate an unusual or unexpected situation.

simple past tense and past participle of make do

Third-person singular simple present indicative form of make do

present participle of make do

(UK, colloquial) fair enough

The supposedly helpful activities of a do-gooder.