paññā-vimutti: 'deliverance through wisdom' (or understanding'), signifies, according to Com. to A.V, 142, the wisdom associated with the fruition of holiness (Arahatta-phala). In Pug. 31 and similarly in M. 70, it is said: "A monk may not have reached in his own person the 8 liberations (=jhāna, q.v.), but through his wisdom the cankers have come to extinction in him. Such a person is called wisdom-liberated" (paññā-vimutta). - Com. to Pug.: "He may be one of five persons: either a practiser of bare insight (sukkha-vipassako, q.v.), or one who has attained  to Holiness after rising from one of the absorptions." See S. XII, 7().

The term is often linked with ceto-vimutti (q.v.), 'deliverance of mind'.

Buddhist Dictionary, Manual of Buddhist Terms and Doctrines, by NYANATILOKA MAHATHERA

慧解脫  Liberation attained through wisdom.