Found 2 items, similar to subtend. English → English (WordNet) Definition: subtend subtend v : be opposite to; of angles and sides, in geometry [syn: delimit] English → English (gcide) Definition: Subtend Subtend \Sub*tend"\, v. t. [imp. & p. p. Subtended; p. pr. & vb. n. Subtending.] [L. subtendere; sub under + tendere to stretch, extend. See Tend.] To extend under, or be opposed to; as, the line of a triangle which subtends the right angle; the chord subtends an arc. [1913 Webster]