Con‐ven″tion‐al‐ism (?), n. 1. That which is received or established by convention or arbitrary agreement; that which is in accordance with the fashion, tradition, or usage.
All the artifice and conventionalism of life.
Hawthorne.
They gaze on all with dead, dim eyes, — wrapped in conventionalisms,... simulating feelings according to a received standard.
F. W. Robertson.
2. (Fine Arts) The principles or practice of conventionalizing. See Conventionalize, v. t.