ALL meanings of army ant
ar·my ant
A a - noun army ant any of various mainly tropical American predatory ants of the subfamily Dorylinae, which live in temporary nests and travel in vast hordes preying on other animals 3
- noun army ant any of a number of carnivorous ants that travel in long lines and prey on insects and animals in their path; esp., any of a genus (Eciton) of such ants of the American tropics and S U.S. 3
- noun army ant any of the chiefly tropical ants of the suborder Dorylinae that travel in vast swarms, preying mainly on other insects. 1