What is the meaning of Slate?

A fine-grained homogeneous sedimentary rock composed of clay or volcanic ash which has been metamorphosed so that it cleaves easily into thin layers.

The bluish-grey colour of most slate.

A chalkboard, sheet of slate for writing on with chalk or with a thin rod of slate (a slate pencil) formerly commonly used by both students and teachers in schools.

A roofing-tile made of slate.

A record of money owed.

A list of affiliated candidates for an election.

An artificial material resembling slate and used for the same purposes.

A thin plate of any material; a flake.

A tablet computer.

A clapperboard.

Having the bluish-grey/gray colour of slate.

To cover with slate.

To criticise harshly.

To schedule.

To anticipate or strongly expect.

To set a dog upon (a person).

To nominate, appoint, or designate.

To record a synchronization mark using a clapperboard.

Source: wiktionary.org