nounAinmfhocal1untrue ideabréagfem2cmuseachránmasc1cmuhe labours under the delusion that he's in chargeé féin atá i gceannas, dar leis2medicineleigheas, psychology & psychiatrysíceolaíocht & síciatrachtsign of mental illnesssiabhránmasc1cmushe suffers from delusionsbíonn siabhráin uirthi