(1):

(n.) That which is used to refine; especially, a preparation of isinglass, gelatin, etc., for clarifying beer.

(2):

(n.) The act of imposing a fin/.

(3):

(n.) The process of fining or refining; clarification; also (Metal.), the conversion of cast iron into suitable for puddling, in a hearth or charcoal fire.

(4):

(p. pr. & vb. n.) of Fine