imperfection Play nounA fault, blemish, or undesirable feature. SYNONYMS blemishbreakchipcrackdefectdeficiencydeformitydentdiscolorationdisfigurementfailingfallibilityfaultflawfoiblefrailtyinadequacyinfirmitylimitationmarknicknotchpitscratchshortcomingspotstainstreakweakness