1) ADJ-GRADED: v n ADJ, v-link ADJ If someone or something is off-balance, they can easily fall or be knocked over because they are not standing firmly.

He tried to use his own weight to push his attacker off but he was off balance...

The lunge had thrown him off-balance and he spun, trying to regain his centre of gravity.

2) ADJ-GRADED: usu v n ADJ If someone is caught off-balance, they are extremely surprised or upset by a particular event or piece of news they are not expecting.

Mullins knocked me off-balance with his abrupt change of subject...

The government was thrown off-balance by the attempted coup.

English dictionary. 2008.