MACH NUMBER(noun)Did you mean?Antonyms RhymesDefinitions There is 1 meaning of the phrase Mach Number. Mach Number - as a noun The ratio of the speed of a moving body to the speed of sound Word Variations & RelationsAnagramsStarts MStarts MAStarts MACStarts MACHEnds REnds EREnds BEREnds MBERStarts M & ends RStarts MA & ends RStarts M & ends ERWords containing MACHNUMBERA-Z Proximitiesmacers10maces9macgregormacguffinmach11 Mach Number machaerantheramachair14machairodont20machairodonts21machairs15