3. Of solid or weighty character; not insubstantial; of cinsequence; not be dispensed with; important. Discourse, which was always material, never trifling. (Evelyn) I shall, in the account of simple ideas, set down only such as are most material to our present purpose. (Locke)
4. (Science: logic) Pertaining to the matter, as opposed to the form, of a thing. See matter. Material cause. See cause. Material evidence, evidence which conduces to the proof or disproof of a relevant hypothesis.