used or intended to protect someone or something against attack [≠ offensive]:
The prince drew up his forces in a strong defensive position.
The rockets are a purely defensive measure against nuclear attack.
behaving in a way that shows you think someone is criticizing you even if they are not:
She despised herself for sounding so defensive.
a reserved and defensive manner
3DS American English
relating to stopping the other team from getting points in a game [≠ offensive]:
—defensiveness noun [uncountable]