What is the meaning of Lair?

A place inhabited by a wild animal, often a cave or a hole in the ground.

A shed or shelter for domestic animals.

A place inhabited by a criminal or criminals, a superhero or a supervillain; a refuge, retreat, haven or hideaway.

A bed or resting place.

A grave; a cemetery plot.

A group where pickup artists meet to discuss and practise seduction techniques.

To rest; to dwell.

To lay down.

To bury.

A bog; a mire.

To mire.

To become mired.

A person who dresses in a showy but tasteless manner and behaves in a vulgar and conceited way; a show-off.

Obsolete form of layer.

lore

Source: wiktionary.org