Liberation (Skt. moksha, Wyl. thar pa, Tib. ཐར་པ་ ) usually means freedom from samsara, either by attaining the state of an arhat or the state of perfect enlightenment of a buddha. It can also occasionally have the meaning of performing the action of liberation, a practice to liberate the consciousness of a malignant being into a buddha field. 
- *From the glossary in The Words of My Perfect Teacher, by Patrul Rinpoche. Translated by Padmakara Translation Group, Published by Harper Collins, ISBN 0-06-066449-5.