/ Dictionary / Index P paid-in surplus: Meaning and Definition of Find definitions for: paid'-in sur'plus Pronunciation: [key] — Accounting. Accounting. surplus paid in by purchasers of stock certificates sold at a premium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. paid-in paido- Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language