A place of confrontation.
A barrier constructed across a road, especially as a military defence
An obstacle, barrier, or bulwark.
to close or block a road etc., using a barricade
to keep someone in (or out), using a blockade, especially ships in a port
An attacking move.
An operational flight carried out by a spacecraft involving a return to Earth.
An operational flight carried out by a single military aircraft.
An act of venturing out to do a task, etc.
An attack made by troops from a besieged position; a sally.
An act of trying to enter a new field of activity.
Synonym of sally port (“an entry to or opening into a fortification to enable a sally”)
A series of aerial photographs taken during the flight of an aircraft; (by extension) a photography session.
To carry out a sortie; to sally.