Synonyms for irrational

Adjective

1. irrational (vs. rational), blind, unreasoning, incoherent, reasonless, nonrational, superstitious, illogical#1, unlogical, incoherent, unreasonable

usage: not consistent with or using reason; "irrational fears"; "irrational animals"

2. irrational (vs. rational)

usage: real but not expressible as the quotient of two integers; "irrational numbers"