Ostracize, v. t. [imp. & p. p. Ostracized; p. pr. & vb. n. Ostracizing.]
Etymology: [Gr. Osseous, Oyster.]
1. (Gr. Antiq.)
To exile by ostracism; to banish by a popular vote, as at Athens. Grote.
2. To banish from society; to put under the ban; to cast out from social, political, or private favor; as, he was ostracized by his former friends. Marvell.
Shades of meaning
Fernald has no entry of its own for ostracize; he lists it under banish.
He lists it without comment; the entries above explain its neighbors.