Prevention, n.
Etymology: [Cf. F. prévention.]
1. The act of going, or state of being, before. [Obs.] The greater the distance, the greater the prevention. Bacon.
2. Anticipation; esp., anticipation of needs or wishes; hence, precaution; forethought. [Obs.] Hammond. Shak.
3. The act of preventing or hindering; obstruction of action, access, or approach; thwarting. South. Casca, be sudden, for we fear prevention. Shak.
4. Prejudice; prepossession. [A Gallicism] Dryden.
Shades of meaning
Fernald lists prevention only as an antonym, under permission.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given