/tooh"beuh, tyooh"-/ , n. , pl. tubas for 1a, b, 2; tubae /-bee/ for 1c.
1. Music.
a. a valved, brass wind instrument having a low range.
b. an organ reed stop of large scale with tones of exceptional power.
c. an ancient Roman trumpet.
2. Meteorol. See funnel cloud .
[ 1850-55; ]