n.[C][U]

1. 病，疾病
   Most diseases could be wiped out.

   大多数疾病是可以被消灭的。

   The business of doctors is to prevent and cure diseases.

   医生的职责是预防和治疗疾病。

2. 【植】病害
3. （精神，道德的）不健全；（社会制度等的）弊病

vt.

1. 使生病；使不健全

n.

1. a disorder of structure or function in a human, animal, or plant, especially one that produces specific symptoms or that affects a specific part.
2. a quality or disposition that adversely affects a person or group:
   the British disease of self-deprecation.