'Undergrow' definitions:

Definition of 'undergrow'

(from WordNet)
verb
Grow below something; "The moss undergrew the stone patio"

Definition of 'Undergrow'

From: GCIDE
  • Undergrow \Un`der*grow"\, v. i. To grow to an inferior, or less than the usual, size or height. --Wyclif. [1913 Webster]

Definition of 'Undergrow'

From: GCIDE
  • Undergrow \Un`der*grow"\, a. Undergrown. [Obs.] --Chaucer. [1913 Webster]