/pis'tl air"oh/ ; Sp. /pees'taw le"rddaw/ , n. , pl. pistoleros /-tl air"ohz/ ; Sp. /-taw le"rddaws/ . (esp. in Mexico and Central America)
1. a member of an armed band of roving mounted bandits.
2. a gunman or hired killer.
[ 1935-40; pistol ( a ) PISTOL + -ero -arius -ARY ]