What is the meaning of the word ‘foraging’?

It means searching of wild food resources. 

Foraging can be categorized into two main types. The first is solitary foraging, when animals forage by themselves. The second is group foraging. Group foraging includes when animals can be seen foraging together when it is beneficial for them to do so (called an aggregation economy) and when it is detrimental for them to do so (called a dispersion economy).

Source: Foraging – Wikipedia, the free encyclopedia