To pronounce, announce, utter, say, or clearly indicate, as though officially, or with authority, or bearing formality.
"I shall never eat white meat again," the guy declared to himself.
by Jon Davis January 14, 2004
Declare: short for Declaring my independence. Used as a slang term for smoking Cannabis, due to the fact that the United States Declaration of Independence was drafted on hemp paper. The phrase originated from the International School of Indiana, located in Indianapolis.

Note: declaration can be used as a noun as a slang for cannabis
-Hey, why don't we go over to Stephanie's and declare tonight?
-Great idea.

or

-Do you know somewhere where i may be able to purchase some declaration?
by anonymous 2323 April 19, 2010
A radio brevity code used to inquire about the ID of a track, target, or group. Responses include:

Friendly: a positively identified friendly surface position, ship, aircraft, or spacecraft.

Bogey: a contact whose identity unknown.

Bandit: a contact that has been positively identified as an enemy in accordance with theatre ID data. Does not imply the unit or element requesting the declare has been directed or has the authority to engage.

Hostile: a contact that has been positively identified as an enemy. The difference between "hostile" and "bandit" is that with "hostile," the unit or element requesting the declare has permission to fire on the hostile in accordance with theatre rules of engagement. A "bandit" is a target where permission has not been granted.

Neutral: a positively identified ground position, ship, or aircraft whose behavior, origin, characteristics, or nationality indicate that it is neither supporting nor apposing friendly forces.

Unable: the unit or element from which the declare has been requested cannot comply as requested or directed.

Clean: no information is available about the track, target, or group of interest.

Furball: non-friendly and friendly aircraft are within five nautical miles of each other.

All responses to a declare request are given in bullseye format: the bullseye is an established reference point from position is referenced by magnetic bearing and range in nautical miles.
"Knight, declare!"
"Single group, hostile, two-three-zero for thirty."
by ThexLoneWolf April 15, 2022
A broad, and life-changing statement popularized by Marshall Erikson from How I Met Your Mother.
by Tonight we dance June 11, 2014
When you set the lock screen on your school computer to chocolate milk but the person who uses the computer in the period after you sets it to regular milk.
"I didn't want it to have to come to this, but your heinous acts have left me no choice. What you have presented me is a Declaration of War."
by Chifutakushi February 12, 2020