大自在  Great freedom; great unhinderedness. (2) A reference to Maheśvara 大自在天.

Īśvara, self-existent, sovereign, independent, absolute, used of Buddhas and bodhisattvas.

A Dictionary of Chinese Buddhist Terms, William Edward Soothill and Lewis Hodous

（術語）言廣大之力用無論何事皆作得也。法華經弟子授記品曰：「諸佛有大自在神通之力。」

丁福保《佛學大辭典》

mahêśvara; paramêśvara, mahā-deva, maheśākhya-maheśākhya, mahêśvaryādhipatya, māhātmya, rājyaiśvarya, rudra, śiva, svayaṃ-bhū.

佛教漢梵大辭典, 平川彰 Buddhist Chinese-Sanskrit Dictionary, Akira Hirakawa

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