v.
   - give an authoritative or peremptory order. ▸Military  be in charge of (a unit). ▸archaic control or restrain (oneself or one's feelings). 
- dominate (a strategic position) from a superior height.
- be in a strong enough position to have or secure:![]()  they command a majority in Parliament. 
n.
   - an authoritative order. ▸authority, especially over armed forces: ![]()  the officer in command. 
▸a group of officers exercising control over a group or operation. ▸a body of troops or a district under the control of a particular officer. 
- the ability to use or control something:![]()  his command of English. 
- an instruction causing a computer to perform one of its basic functions.
Etymology
  ME: from OFr. comander, from late L. commandare, from com- (expressing intensive force) + mandare ‘commit, command’.