slate

1 slate /ˈsleɪt/ noun
plural slates
1 slate
/ˈsleɪt/
noun
plural slates
Britannica Dictionary definition of SLATE
1 
[noncount] : a type of hard rock that splits easily into thin layers
2 
[count] : a small sheet of slate in a wooden frame that was used in schools in the past for writing on with chalk — see also blank slate
3 
[count] : a piece of slate that is used with others to cover a roof or wall
4 
[count] US : a list of people who are trying to win an election

clean slate

— see 1clean

wipe the slate clean

— see 1wipe
2 slate /ˈsleɪt/ verb
slates; slated; slating
2 slate
/ˈsleɪt/
verb
slates; slated; slating
Britannica Dictionary definition of SLATE
[+ object] chiefly US
: to arrange or plan for something to happen, someone to be chosen, etc. — usually used as (be) slated
— often + for
3 slate /ˈsleɪt/ verb
slates; slated; slating
3 slate
/ˈsleɪt/
verb
slates; slated; slating
Britannica Dictionary definition of SLATE
[+ object] British, informal
: to criticize (someone or something) very harshly