The Pali Text Society's Pali-English dictionary
Obhāsa,[from obhāsati] shine,splendour,light,lustre,effulgence; appearance.In clairvoyant language also “aura” (see Cpd.2141 with C.expln. “rays emitted from the body on account of insight”) -- D.I,220 (effulgence of light); M.III,120,157; A.II,130,139; IV,302; It.108 (obhāsakara); Ps.I,114,119 (paññā°); II,100,150 sq.,159,162; Vism.28,41; PvA.276 (°ṃ pharati to emit a radiance); Sdhp.325.With nimitta and parikathā at Vism.23; SnA 497.See also avabhāsa.(Page 169)
Concise Pali-English Dictionary by A.P. Buddhadatta Mahathera
(m.)
light; lustre.
Buddhist Dictionary by NYANATILOKA MAHATHERA
obhāsa:'effulgence of light',aura,appearing at times during deep insight (vipassanā),may become a 'defilement of insight' (vipassanūpakkilesa); cf.visuddhi,V.