(1):

(n.) A member of, or sympathizer with, the Fabian Society.

(2):

(a.) Of, pertaining to, or in the manner of, the Roman general, Quintus Fabius Maximus Verrucosus; cautious; dilatory; avoiding a decisive contest.

(3):

(a.) Designating, or pertaining to, a society of socialists, organized in England in 1884 to spread socialistic principles gradually without violent agitation.

(4):

(a.) Of or pertaining to the Roman gens Fabia.