'Rattler' definitions:

Definition of 'rattler'

(from WordNet)
noun
Pit viper with horny segments at the end of the tail that rattle when shaken [syn: rattlesnake, rattler]
noun
A railroad train consisting of freight cars [syn: freight train, rattler]

Definition of 'Rattler'

From: GCIDE
  • Rattler \Rat"tler\ (r[a^]t"tl[~e]r), n. One who, or that which, rattles. [1913 Webster]

Definition of 'rattler'

From: GCIDE