from the GNU version of the Collaborative International Dictionary of English
- n. One who steals and drives away cattle or beasts by herds or droves.
from The Century Dictionary and Cyclopedia
- n. In law, one who feloniously drives away or steals a herd or numbers of cattle at once, in distinction from one who steals a single beast or a few.
From Late Latin abactor ("cattle rustler"), from abigō ("drive away"); from ab ("from, away from") + agō ("drive"). (Wiktionary)