The branch of logic that focuses on the content of reasoning.

A substance, natural or man-made, which is intrinsically dangerous or otherwise poses a safety hazard. Examples are materials which are explosive, poisonous, chemically active (including acids and other corrosives), radioactive, or biologically active (including human blood and other medical waste).

(law) a breach of contract sufficiently serious to destroy the contract / a breach of a treaty which releases other parties from any obligation under it

(logic) An implication as defined in classical propositional logic, leading to the truth of paradoxes of material implication such as Q⊢P→Q, to be read as "any proposition whatsoever is a sufficient condition for a true proposition".

Essential components of a device, reaction, etc. / A radioactive material

A textile of silk and wool, soft and flexible, usually with oriental designs, used for women's dresses.

Alternative form of bill of materials

plural of material breach

(philosophy, natural science) The stuff or matter of which something is made.

plural of bill of material