1 (set) free, release, set at liberty, disenthral, emancipate, manumit, deliver, enfranchise, (let) loose, let go, let out, let off:
When the enemy retreated, the army liberated the prisoners of war. After her divorce, she felt like a liberated woman
2 steal, pilfer, purloin, take, appropriate:
She was caught liberating some books from the library.