Slate

noun
1.
a fine-grained rock formed by the metamorphosis of clay, shale, etc., that tends to split along parallel cleavage planes, usually at an angle to the planes of stratification.
2.
a thin piece or plate of this rock or a similar material, used especially for roofing or as a writing surface.
3.
a dull, dark bluish gray.
4.
a list of candidates, officers, etc., to be considered for nomination, appointment, election, or the like.
verb (used with object), slated, slating.
5.
to cover with or as with slate.
6.
to write or set down for nomination or appointment:
the district leader slated for city judge.
7.
to plan or designate (something) for a particular place and time; schedule:
The premiere was slated for January.
8.
to censure or criticize harshly or violently; scold.
9.
to punish severely.
Idioms
10.
clean slate, an unsullied record; a record marked by creditable conduct:
to start over with a clean slate.
verb (used with object), slated, slating. British.
1.
to sic or set a dog on (a person or animal).
noun
1.

a compact fine-grained metamorphic rock formed by the effects of heat and pressure on shale. It can be split into thin layers along natural cleavage planes and is used as a roofing and paving material
(as modifier): a slate tile

2.
a roofing tile of slate
3.
(formerly) a writing tablet of slate
4.
a dark grey colour, often with a purplish or bluish tinge
5.
(mainly US & Canadian) a list of candidates in an election
6.
(films)

the reference information written on a clapperboard
(informal) the clapperboard itself

7.
clean slate, a record without dishonour
8.
(Brit & Irish, informal) have a slate loose, to be eccentric or crazy
9.
(Brit, informal) on the slate, on credit
10.
(informal) wipe the slate clean, to make a fresh start, esp by forgetting past differences
verb (transitive)
11.
to cover (a roof) with slates
12.
(mainly US) to enter (a person’s name) on a list, esp on a political slate
13.

to choose or destine: he was slated to go far
to plan or schedule: the trial is slated to begin in three weeks

adjective
14.
of the colour slate
verb (transitive) (informal, mainly Brit)
1.
to criticize harshly; censure
2.
to punish or defeat severely
slate
(slāt)
A fine-grained metamorphic rock that forms when shale undergoes metamorphosis. Slate splits into thin layers with smooth surfaces. It ranges in color from gray to black or from red to green, depending on the minerals contained in the shale from which it formed.
In addition to the idiom beginning with slate