/ Dictionary / Index S SSI: Meaning and Definition of Find definitions for: SSI Pronunciation: [key] — Electronics. Electronics. small-scale integration: the technology for concentrating up to ten semiconductor devices in a single integrated circuit. Cf. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. SSE S sleep Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language