definition 1* : a huge beast, perhaps a hippopotamus, mentioned in the Book of Job in the Old Testament.
definition 2** : any enormous or powerful creature or thing.
* “Behemoth is a type of the devil; but behold how he handleth his tail, even as if a man should swing about a cedar. This is spoken to show the hurtfulness of the tail, as it is also said in another place, Rev. 9:5,10,19. (John Bunyan)”
** “Birmingham’s new library is a modern behemoth that encases the past. (The Guardian, Aug. 29, 20131)“