(transitive, archaic) To distinguish, to make noteworthy.

(transitive, archaic) To display or make known (an attribute, quality, etc.); to call attention to.

(transitive, archaic) To point out; to take special note of.

(transitive, chiefly nautical) To communicate with (someone) by means of a signal.

(transitive) To indicate; to be a sign of.

(transitive, chiefly Canada, US) To furnish (a traffic intersection) with a traffic signal.