Noun

(en noun)

(logic) The negation in logic.

A refusal to comply with a request.

An assertion of untruth.

Refusal to believe a problem exists

*{{quote-magazine, date=2013-06-28, author=(Joris Luyendijk)

, volume=189, issue=3, page=21, magazine=(The Guardian Weekly) , title= Our banks are out of control , passage=Seeing the British establishment struggle with the financial sector is like watching an alcoholic […].  Until 2008 there was denial over what finance had become. When a series of bank failures made this impossible, there was widespread anger, leading to the public humiliation of symbolic figures.}}

(dated, psychology) A defense mechanism involving a refusal to accept the truth of a phenomenon or prospect.

* 2007 Feb. 11, " No facts, just emotion," Washington Times (retrieved 11 June 2013):

"Denial " came out of the therapyspeak prevalent in the middle of the 20th century, especially as it was applied to confronting the reality of mortality. It was popularized as the first stage of grief, and quickly expanded to include refusal to confront any bad news or disturbing ideas.

Noun

(en noun)

The act of objecting.

* {{quote-magazine, date=2013-06-07, author= Ed Pilkington

, volume=188, issue=26, page=6, magazine=(The Guardian Weekly) , title= ‘Killer robots’ should be banned in advance, UN told , passage=In his submission to the UN, [Christof] Heyns points to the experience of drones. Unmanned aerial vehicles were intended initially only for surveillance, and their use for offensive purposes was prohibited, yet once strategists realised their perceived advantages as a means of carrying out targeted killings, all objections were swept out of the way.}}

A statement expressing opposition, or a reason or cause for expressing opposition (generally followed by the adposition to ).

(legal) An official protest raised in a court of law during a legal trial over a violation of the rules of the court by the opposing party.