What is the meaning of Poach?

To cook (something) in simmering or very hot liquid (usually water; sometimes wine, broth, or otherwise).

To be cooked in such manner.

The act of cooking in simmering liquid.

To trespass on another's property to take fish or game.

To take game or fish illegally.

To take anything illegally or unfairly.

To intrude; to interfere; to get involved inappropriately, without welcome.

To entice (an employee or customer) to switch from a competing company to one's own.

To make soft or muddy by trampling.

To become soft or muddy by being trampled on.

To stab; to pierce; to spear or drive or plunge into something.

The act of taking something unfairly, as in tennis doubles where one player returns a shot that their partner was better placed to return.

Source: wiktionary.org