to defend or protect against an attack; defensive measures or actions

to fight back against an attack, invasion, or external pressure

to defend against the cold; to keep warm

defensive (weapons)

to face or fend off a championship challenger or contender in a sporting contest

structures or works constructed for the purpose of defense in warfare, such as bunkers, trenches, or walls

to defend

earned run average (baseball)

Auriga (constellation)

internal disunity dissolves at the threat of an invasion from outside