Ellis island has 2 different meanings across 2 categories:
Noun
· Proper Noun
Noun
1
an island in New York Bay that was formerly the principal immigration station for the United States
"some twelve millions immigrants passed through Ellis Island"
Proper Noun
1
A 27.5-acre island in the states of New Jersey and New York where millions of immigrants and others were processed, up until the 1950s.