What is the meaning of Masu?

A plant, Hedysarum alpinum, whose edible root is consumed by the Inuit of Alaska.

A square wooden box, originally used to measure rice in Japan during the feudal period.

masu salmon (Oncorhynchus masou)

thickness

dative/locative singular of maso

tummy

Rōmaji transcription of ます

Rōmaji transcription of マス

past participle of manoir

if… is

Source: wiktionary.org