Per definition at dictionary.com a free online dictionary with pronunciation synonyms and translation. look it up now! Used in expressing ratios of units. miles per gallon. beats per minute. through (the) (followed by latin name for an orifice) introduce the endoscope per nasum.. Translations of per. per synonyms per antonyms. information about per in the free online english dictionary and encyclopedia. per diem per annum. Per- pref. thoroughly; completely; intensely: perfervid. containing an element in its highest oxidation state: perchloric acid Per prep. to for or by each; for every: gasoline once cost 40 cents per gallon. according to; by: changes were made to the manuscript per the Information about per- in the free online english dictionary and encyclopedia. per. believe me or not his intelligence was per- fectly clear--concentrated it is true upon. Definition of per from the merriam-webster online dictionary with audio pronunciations thesaurus word of the day and word games. Definition of per from webster's new world college dictionary. meaning of per. pronunciation of per. definition of the word per. origin of the word per Look up per in wiktionary the free dictionary. per or per may refer to: a scandinavian. per (storm) a storm in sweden in january 2007. the ioc country code. Per strives to measure a player's per-minute performance while adjusting for pace.. per takes into account positive accomplishments such as field goals free.