/ Dictionary / Index P president pro tempore: Meaning and Definition of Find definitions for: pres'ident pro tem'pore Pronunciation: [key] — U.S. Govt. U.S. Govt. a senator, usually a senior member of the majority party, who is chosen to preside over the Senate in the absence of the vice president. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. presidential suite Presidents' Day Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language