Meaning of semantic differential

seman'tic differen'tial

Pronunciation: [key]
— Psycholing.
  1. a technique for measuring the connotative meaning of concepts by having an individual rate each concept on a series of graduated scales, each scale defined by a pair of polar adjectives, as good–bad or strong–weak.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.