Chiefly of vegetation: vigorous or luxuriant in growth. In later use usually in negative sense: growing too luxuriantly or rampantly; thick and…

That shows considerable or satisfactory growth or development.

Of a beard: fully grown, very long.

= luxuriant, adj. 2. Now rare.

Of plants, etc.: Growing profusely, exuberant, rank. †Of flesh: Growing to excess (obsolete).