Definitions
1.nounThe physical blocking or surrounding of a place, especially a port, in order to prevent commerce and traffic in or out.
2.noun(by extension) Any form of formal isolation of something, especially with the force of law or arms.
3.nounThe ships or other forces used to effect a naval blockade.
4.nounPreventing an opponent's pawn moving by placing a piece in front of it
5.verbTo create a blockade against.