Mach number

noun

The ratio of the speed of a body to that of sound in the surrounding medium.

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Meanings

nounMach number (uncountable)
  1. uncountablenatural sciencesThe ratio of the speed of a body to that of sound in the surrounding medium.

Origin

After physicist Ernst Mach.

Full word history & related roots →

Translations

Catalan nombre de Mach
  • nombre de Machratio — see also Mach
Chinese Mandarin 馬赫數 /马赫数
  • 馬赫數 /马赫数ratio — see also Mach
Czech Machovo číslo
  • Machovo čísloratio — see also Mach
Dutch machgetal
  • machgetalratio — see also Mach
Estonian Machi arv
  • Machi arvratio — see also Mach
Finnish Machin luku
  • Machin lukuratio — see also Mach
German Mach-Zahl
  • Mach-Zahlratio — see also Mach
Greek αριθμός Μαχ
  • αριθμός Μαχ (arithmós Mach)ratio — see also Mach
Italian numero di Mach
  • numero di Machratio — see also Mach
Japanese マッハ数
  • マッハ数 (mahha sū)ratio — see also Mach
Korean 마하 수
  • 마하 수 (maha su)ratio — see also Mach
Portuguese número de Mach, número Mach
  • número de Machratio — see also Mach
  • número Machratio — see also Mach
Romanian numărul lui Mach
  • numărul lui Machratio — see also Mach
Spanish número Mach
  • número Machratio — see also Mach
Thai เลขมัค
  • เลขมัคratio — see also Mach
Turkish Mach sayısı
  • Mach sayısıratio — see also Mach
Cite this entry
APA

Mach number. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/Mach%20number

MLA

“Mach number.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Mach%20number. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “Mach number,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/Mach%20number.

Source: Mach number on Wiktionary, CC BY-SA 4.0.