1.the act of upsetting something;
he was badly bruised by the upset of his sled at a high speed
2.an improbable and unexpected victory;
the biggest upset since David beat Goliath
1.turn from an upright or normal position;
The big vase overturned
2.cause to overturn from an upright or normal position;
The cat knocked over the flower vase
3.rule against;
The Republicans were overruled when the House voted on the bill
4.cause the downfall of; of rulers;
The Czar was overthrown
5.annul by recalling or rescinding;
He revoked the ban on smoking
6.change radically;
E-mail revolutionized communication in academe