Sc. [Prob. ellipt. for I vow: cf. VOW v.2 2 b.] An exclamation used to emphasize a statement. (See also WOW int.)

1

1787.  Burns, What will I do, 4. My only beast, I had nae mae, And vow but I was vogie!

2

1814.  W. Nicholson, Poems, Annandale Robin, iii. Hech me! but its lang since I saw you, And vow! ye’re grown gaudy and grand.

3

a. 1870.  D. Thomson, Musings (1881), 117. When I saw that ye were weel, Vow, man, but I was gled.

4