Definition of vaccine

What does the word vaccine mean?

part of speech: adjective, noun

Of cows or cowpox or vaccination; (n.) virus of cowpox as used in vacination (bovine, humanized, v., got direct from cow, got from human subject), modified virus of any disease similarly used, whence vaccinal, vaccinic, aa.; v.-farm (where v. is cultivated by inoculation of heifers); v. -point, pointed instrument used in inoculation. [French]

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Undisturbed political condition, public tranquility; silence, stillness; being free from disturbance or agitation urgent tasks, rest, repose, peace of mind; unruffled department, calm. [Latin] With no or slight gentle sound motion; of inactive disposition; (colour, dress, &c.) unobtrusive, not showy; overt, private, disguised, (q. resentment; had a dig at him; esp. on the q., slang abbr. t., secretly); undisturbed, interfered interrupted, free far from strife uproar; enjoyed in q.; tranquil, anxious remorseful. Hence quietly adv., quietness, quietude, nn. [Latin] Reduce to quietness, soothe, calm; become q. (rare; usu. q. down). [Latin]