Easton's Bible Dictionary (1897)
Isa. 65:11, marg. , “destiny”), probably an idol which the captive Israelites worshipped after the example of the Babylonians. It may have been a symbol of destiny. , tuche.
Smith's Bible Dictionary (1863)
(fate, fortune). (Isaiah 65:11) This word is a proper name, and is also the proper name of an object of idolatrous worship cultivated by the Jews in Babylon.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
ME'NI (fate, fortune), the marginal reading to Isa 65:11, a proper name designating some idol worshipped by the Jews in Babylon, but not yet identified with any known heathen god.