Definify.com

Webster 1913 Edition

(lĭgˊnĭ-fĭ-kā′shŭn)

Noun.

[Cf. F.

lignification

. See

(Bot.)

A change in the character of a cell wall, by which it becomes harder. It is supposed to be due to an incrustation of lignin.

Noun.

The process of becoming or of converting into wood, or the hard substance of a vegetable.

lignification ‎(plural lignifications)

Turning to wood; the process of becoming ligneous.
- 2012, Richard W. Hemingway, Plant Polyphenols: Synthesis, Properties, Significance:
  Given the presumed role(s) of monolignol glucosides in lignification, it was of considerable interest to next establish whether UDPG:coniferyl alcohol (CA) glucosyl-transferases exhibited any substrate stereoselectivity toward either E- or Z-monolignols.

turning to wood, the process of becoming ligneous