Before; as, " the joys that came ere I was old"; sooner than; as, I will fight ere I will submit: prep. before.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (conjunction) (conj.) (conjunction)
- Newage Dictionary DB (conjunction) (conj.) (conjunction)
Before; sooner than.
- Newage Dictionary DB (adverb) (adv.) (adverb)

Usage examples:

Here the good Colonel's voice was much moved, and his face grew very red, and he passed his hand over his eyes ere he held it out.
- The Virginians by William Makepeace Thackeray
Or else, ere we expect, what if they came?
- Jerusalem Delivered by Torquato Tasso
Didn't I meet him back in Pribawn ere yistherday.
- Mount Music by E. Oe. Somerville and Martin Ross