slate noun (ROCK) › [ C or U ] a dark grey rock that can be easily divided into thin pieces, or a small, thin piece of this used to cover a roof. Thesaurus: synonyms and related words.
http://dictionary.cambridge.org/dictionary/english/slate
a. 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. b. (as modifier): a slate tile. 2. (Building) a roofing tile of slate.
http://www.thefreedictionary.com/slate
Wiktionary(0.00 / 0 votes)Rate this definition: slate(Noun) A fine-grained homogeneous sedimentary rock composed of clay or volcanic ash which has been metamorphosed so that it cleaves easily into thin layers. slate(Noun) A sheet of slate for writing on with chalk. slate(Noun) A tile made of slate. slate(Noun) A record of money owed.
http://www.definitions.net/definition/SLATE
slate noun (FOR WRITING) › [ C ] in the past, a small, thin, rectangular piece of slate (= rock), usually in a wooden frame, used for writing on, especially by children. Thesaurus: synonyms and related words.
http://dictionary.cambridge.org/dictionary/english/slate
Definition of slate. 1 : a piece of construction material (as laminated rock) prepared as a shingle for roofing and siding. 2 : a dense fine-grained metamorphic rock produced by the compression of various sediments (as clay or shale) so as to develop a characteristic cleavage.
https://www.merriam-webster.com/dictionary/slate
A fine-grained metamorphic rock that splits into thin, smooth-surfaced layers. 2. a. A piece of this rock cut for use as roofing or surfacing material or as a writing surface. b. A writing tablet made of a similar material. 3. A record of past performance or activity: start over with a clean slate.
http://www.thefreedictionary.com/slate
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.
http://www.dictionary.com/browse/slate
slate noun (ROCK) › [ 1  C or U ] a dark grey rock that can be easily divided into thin pieces, or a small, thin piece of this used to cover a roof. › [ 2  C ] in the past, a small, thin, rectangular piece of slate (= rock), usually in a wooden frame, used for writing on, especially by children.
http://dictionary.cambridge.org/dictionary/english/slate
Definition of slate for English Language Learners. : a type of hard rock that splits easily into thin layers. : a small sheet of slate in a wooden frame that was used in schools in the past for writing on with chalk.
https://www.merriam-webster.com/dictionary/slate
Definition of slate for English Language Learners. : 1  a type of hard rock that splits easily into thin layers. : 2  a small sheet of slate in a wooden frame that was used in schools in the past for writing on with chalk. : 3  a piece of slate that is used with others to cover a roof or wall.
https://www.merriam-webster.com/dictionary/slate
define: slate
Slate is a piece of construction material prepared as a shingle for roofing and siding.