Intermission, n.
Etymology: [L. intermissio: cf. F. intermission. See Intermit.]
1. The act or the state of intermitting; the state of being neglected or disused; disuse; discontinuance. B. Jonson.
2. Cessation for a time; an intervening period of time; an interval; a temporary pause; as, to labor without intermission; an intermission of ten minutes. Rest or intermission none I find. Milton.
3. (Med.)
The temporary cessation or subsidence of a fever; the space of time between the paroxysms of a disease. Intermission is an entire cessation, as distinguished from remission, or abatement of fever.
2 more senses
4. Intervention; interposition. [Obs.] Heylin.
Syn. -- Cessation; interruption; interval; pause; stop; rest; suspension. See Cessation.
Shades of meaning
Fernald has no entry of its own for intermission; he lists it under rest.
He lists it without comment; the entries above explain its neighbors.