an enthusiastic demonstration/expression of acclaim or appreciation, especially from an audience in the form of sustained applause;
e.g. His excellent performance earned him a standing ovation from the audience.
(noun)
in ancient Rome, a ceremony during which a victorious general enters Rome, in a case where his victory/honor is not significant enough to be granted a 'triumph';
e.g. The general received an ovation when he returned to Rome from battle;