slate

A flake or piece of certain types of stone that tend to cleave into thin layers.

Some of the minor Welsh 2 ft. gauge railways, we hear from Mr. N. F. G. Dalston, are enjoying a miniature boom owing to the demand for slate for the repair of damaged roofs.

In 1765 only 80 men were employed, and the annual output of slates did not exceed 1,000 tons, and large-scale quarrying was not begun by Lord Penrhyn until 1782.

A flake or piece of certain types of stone that tend to cleave into thin layers.

A generally rectangular piece, originally of certain types of stone and now of other materials, often in a frame, used for writing on with a thin rod of the same or another stone (a slate pencil) or with chalk; a small chalkboard.

He wrote all down one side of the slate and all up the other, and then remarked--"As there's no time to finish that, The time has come to have our chat."

Synonym of tablet computer (“a hand-held portable computer in the form of a tablet with a touch screen interface”).

Hearing Steve Ballmer and others talk about the availability of Windows 8 on slates, laptops, netbooks, notebooks, and screens from 7 to 70 inches might lead us to believe that Microsoft is attempting to gain market share solely through […]

Synonym of clapperboard (“a device consisting of a board on which information about a film being recorded is noted, and a hinged piece which is brought down on the board with a clap at the start and end of each take of the film; it is used

Having the bluish-grey colour of slate (noun etymology 1 sense 4).

To cover (a building, or part of a building such as a floor or roof) with slates (noun etymology 1 sense 1.1).

The old church ledgers show that the roof was slated in 1775.

To write (something) on a writing slate (noun etymology 1 sense 2.1).

To write (something) on a writing slate (noun etymology 1 sense 2.1).

The next version of our software is slated to be the best release ever.

To write (something) on a writing slate (noun etymology 1 sense 2.1).

The election was slated for November 2nd.

The Cleethorpes to Barton-on-Humber branch had been slated to transfer from Northern into the East Midlands franchise, but this move is still awaiting a DfT decision.

To provide synchronization information about (a scene, take, etc., of a film recording) using a slate (noun etymology 1 sense 2.3.1).

Why You Want to Slate your Shots