Colonel

Colonel. One of two Senior Officer Ranks.

Lieutenant Colonel or Half Colonel is normally the CO of a Regiment or Battalion sized (Major) Unit.

Colonel or Full Colonel is a senior Staff Officer or the CO of an exeptionally large Major Unit such as a training establishment or Depot.

Rhyhming Slang

As in "you going down the Colonel Gadaffi?" (NAAFI)

Rank Structure of the British Army
Commissioned Ranks
Second Lieutenant | Lieutenant | Captain | Major | Lieutenant Colonel | Colonel | Brigadier | Major General | Lieutenant General | General | Field Marshal
Non-commissioned Ranks
Private | Lance Corporal | Corporal | Sergeant | Staff Sergeant | Warrant Officer Class 2 | Warrant Officer Class 1