/ Dictionary / Index D delayed: Meaning and Definition of Find definitions for: de•layed Pronunciation: (di-lād'), [key] — adj. Physics. of or pertaining to a particle, as a neutron or alpha particle, that is emitted from an excited nucleus formed in a nuclear reaction, the emission occurring some time after the reaction is completed. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: delayed (Thesaurus) delay delayed-action Related Content Daily Word Quiz: digression Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language