/ Dictionary / Index A apa: Meaning and Definition of Find definitions for: a•pa Pronunciation: (u-pä'), [key] — n. a tree, Eperua falcata, of tropical America, having reddish-brown wood used in the construction of houses. A•pa Pronunciation: (ä'pä), [key] — n. a river in central South America that flows W along the E Paraguay-SW Brazil border to the Paraguay River. ab. 125 mi. (200 km) long. APA Pronunciation: [key] American Psychiatric Association. American Psychological Association. A.P.A. Pronunciation: [key] American Philological Association. American Protective Association. American Protestant Association. American Psychiatric Association. American Psychological Association. Associate in Public Administration. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. AP apace Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language