Definify.com

Webster 1913 Edition

Adj.

Pertaining to, or having the character of, a digression; departing from the main purpose or subject.

T. Warton.

Adj.

Pertaining to or consisting in digression; departing from the main purpose or subject.

digressional ‎(comparative more digressional, superlative most digressional)

Pertaining to, or having the character of, a digression; departing from the main purpose or subject.
(Can we find and add a quotation of T. Warton to this entry?)