reb

Short definition from Wiktionary

Noun

1. 1
   Clipping of rebel: a Confederate, especially a Confederate soldier.
2. 2
   Shortened form of Rebbe.
3. 3
   An honorific used by traditional Jews, much like sir and mister/Mr.
4. 4
   Abbreviation of Rebel (“Confederate soldier”).
5. 5
   electronic warfare and related techniques, equipment, or troops.

Proper noun

1. 1
   Shortened form of Rebecca.