D defs.my
Entry 2 senses Webster, 1913

Mannerism

/măn'-ẽr-ĭzˌ-əm/ · Man·ner·ism · IPA /ˈmænəˌɹɪzəm/
01 n. Adherence to a peculiar style or manner; a characteristic mode of action, bearing, behavior, or treatment of others.
  1. 1.
    Adherence to a peculiar style or manner; a characteristic mode of action, bearing, behavior, or treatment of others.
  2. 2.
    Adherence to a peculiar style or manner carried to excess, especially in literature or art.
    Mannerism is pardonable,and is sometimes even agreeable, when the manner, though vicious, is natural . . . . But a mannerism which does not sit easy on the mannerist, which has been adopted on principle, and which can be sustained only by constant effort, is always offensive.” Macaulay.