What is the meaning of Defeat?

To overcome in battle or contest.

To reduce, to nothing, the strength of.

To nullify

To prevent (something) from being achieved.

The act or instance of being defeated, of being overcome or vanquished; a loss.

The act or instance of defeating, of overcoming, vanquishing.

Frustration (by prevention of success), stymieing; nullification.

Destruction, ruin.

Source: wiktionary.org