(1):

(v. i.) To impose unequal tariffs for substantially the same service.

(2):

(a.) Having the difference marked; distinguished by certain tokens.

(3):

(v. i.) To treat unequally.

(4):

(v. t.) To set apart as being different; to mark as different; to separate from another by discerning differences; to distinguish.

(5):

(v. i.) To make a difference or distinction; to distinguish accurately; as, in judging of evidence, we should be careful to discriminate between probability and slight presumption.