Dictionary Definition:
Asat (Asanto) [a + sat, ppr. of asti] not being, not being good, i. e. bad, not genuine (cp. asa); freq., e. g. Sn 94, 131, 881, 950; Dh 73, 77, 367; It 69 (asanto nirayaŋ nenti). See also asaddhamma.