1. （情感等）强烈得令人难以承受的，不可抗拒的
An overpowering feeling is so strong that you cannot resist it.

2. （气味、声音等）盖过一切的，过于强烈的
An overpowering smell or sound is so strong that you cannot smell or hear anything else.

3. （人）个性极强的，专横的
An overpowering person makes other people feel uncomfortable because they have such a strong personality.

1. so strong as to be irresistible

e.g. an overpowering need for solitude
the temptation to despair may become overwhelming
an overwhelming majority

Synonym: overwhelming