1. upbow - Noun
2. upbow - Verb
upbow (plural upbows)
(music) A note performed on a string instrument by drawing the bow upward or to the left across the instrument, moving the point of contact from the bow's tip toward the frog.
upbow (third-person singular simple present upbows, present participle upbowing, simple past and past participle upbowed)
(geology) To bend or arc upwards.