ALL meanings of army worm
ar·my worm
A a - noun army worm any of the larvae of certain noctuid moths, esp. of the moth (Pseudaletia unipuncta) of which the caterpillar is dark-striped green and yellow: these larvae travel in large groups, ruining crops and grass 3
- noun army worm the caterpillar of a noctuid moth, Pseudaletia unipuncta, that often travels in large numbers over a region, destroying crops of wheat, corn, etc. 1
- noun army worm any of the larvae of several related moths having similar habits. 1