1. adjective /bɪɡ/
a) Of great size, large.
Elephants are big animals, and they eat a lot.
b) Thought to have undue influence.
There were concerns about the ethics of big science.
2. noun /bɪɡ/
a) An important or powerful person; a celebrity; a big name.
b) The big leagues, big time
3. verb /bɪɡ/
Wikipedia foundation.