Possible Definitions:
1. Rank (superl.) Luxuriant in growth; of vigorous growth; exuberant; grown to immoderate height; as, rank grass; rank weeds.
2. Rank (superl.) Raised to a high degree; violent; extreme; gross; utter; as, rank heresy.
3. Rank (superl.) Causing vigorous growth; producing luxuriantly; very rich and fertile; as, rank land.
4. Rank (superl.) Strong-scented; rancid; musty; as, oil of a rank smell; rank-smelling rue.
5. Rank (superl.) Strong to the taste.
6. Rank (superl.) Inflamed with venereal appetite.
7. Rank (adv.) Rankly; stoutly; violently.
8. Rank (v. t.) To place abreast, or in a line.
9. Rank (v. t.) To range in a particular class, order, or division; to class; also, to dispose methodically; to place in suitable classes or order; to classify.
10. Rank (v. t.) To take rank of; to outrank.
11. Rank (v. i.) To be ranged; to be set or disposed, as in a particular degree, class, order, or division.
12. Rank (v. i.) To have a certain grade or degree of elevation in the orders of civil or military life; to have a certain degree of esteem or consideration; as, he ranks with the first class of poets; he ranks high in public estimation.