As a deity name
Name 577 of the Vishnu Sahasranāma — Mahabharata (Anushasana Parva), as taught by Bhishma to Yudhishthira on his deathbed
As a Hindi name
No reading on this path — this spelling has no entry in our Hindi sources, and no near neighbour is attested there either. We say so rather than invent one.
As a Sanskrit word
Meaning
blowing out, extinction, cessation, setting, vanishing, disappearance (˚ṇaṃ-√ kṛ, to make away with anything i.e. not to keep one's promise)
Scripturally attestedWhy this matches what you typed
M1 · same meaning "nirvāṇaṃ" is the accusative of "nirvāṇa" — the same word in a different grammatical case. (The spelling "nirvāṇaṃ" is looked up as "nirvāṇam" — a standard final-sound spelling variant.)
Dictionary citations
nir-˚vāṇa mfn. blown or put out, extinguished (as a lamp or fire), set (as the sun), calmed, quieted, tamed (cf. a-nirv˚), dead, deceased (lit. having the fire of life extinguished), lost, disappeared, MBh.; Kāv. &c.
immersed, plunged, L.
Caveats
Sources contain errors and engines have limits; every claim above carries its citation so you can verify it. This is guidance about names and their sources — not religious or astrological consultation. How we work · Our sources