semidefinite

English

Etymology

From semi- +‎ definite.

Adjective

semidefinite (not comparable)

1. Not entirely definite; somewhat vague or undefined.
   • 1962, Bruno Klopfer, Helen Hiller Davidson, The Rorschach Technique: An Introductory Manual, page 99:

     Coral rock has only a semidefinite shape.

2. (mathematics) Describing a bilinear form, over a vector space, that is either always positive or always negative.