/ Dictionary / Index I immersion objective: Meaning and Definition of Find definitions for: immer'sion objec"tive Pronunciation: [key] — Optics. Optics. a microscope objective of high resolving power in which the space between the front lens and the cover glass is filled with an oil whose index of refraction is close to that of the objective and the cover glass. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. immersionism immesh Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language