A (comparatively) conservative, reactionary faction that is more unwilling to accept new ideas than their peers are. / Collectively, the members of a team who have been a long time in a place.

A station for guards, especially at the entrance of a town, castle, etc. / Synonym of military prison.

A room used by soldiers when on guard. / A jail cell in which military prisoners are kept.

(UK) Any of several regiments in the Household Division of the British Army / (Ireland) The Gardaí; the police force.

A rail set alongside a dangerous place as a barrier, to improve safety. / (figuratively, by extension) Any barrier designed to prevent accidents or mistakes.

A person, especially a soldier, who is on guard. / (US) A member of the National Guard. / (Britain) A member of a Guards regiment.

Alternative spelling of advance guard

A unit or units leading the way of advancing or marching troops, guarding them from ambushes, reconnoitering and pursuing the enemy, etc. / An individual soldier in the same role.

(fencing) The starting position of a fencing bout; en garde. / Vigilant, alert. / (aviation) Transmitting on the aircraft emergency frequency.

A tree, Paullinia cupana, native to Venezuela and northern Brazil. / The fruit from this tree. / An edible paste prepared from the seeds of the tree, formed into round or oblong cakes.