vippasanna : [pp. of vippasīdati] very clear; pure; bright.

A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]

Vippasanna (adj.) [vi+pasanna] (quite) purified, clear; happy, bright, pure, sinless Vin iii.88 (˚chavivaṇṇa); S i.32 (cetas); iii.2, 235; iv.118, 294; v.301; A iii.41, 236; Sn 637; Dh 82, 413 (=pasanna -- citta DhA iv.192); Pv i.1010 (=suṭṭhu pasanna); ii.935; Vism 262 (where KhA reads pasanna only); DhA ii.127; DA i.221.

Pali-English Dictionary, TW Rhys Davids, William Stede,