sar ‧ dine /ˌsɑːˈdiːn◂ $ ˌsɑːr-/ BrE AmE noun
[ Date: 1400-1500 ; Language: French ; Origin: Latin sardina ]
1 . [countable] a small young fish that is often packed in flat metal boxes when it is sold as food
2 . be packed like sardines to be crowded tightly together in a small space:
commuters packed like sardines on the evening train