As a deity name
Name 793 of the Ganesha Sahasranāma — Ganesha Purana (Upasana Khanda), as taught by Sage Vyasa / Lord Ganesha
Name 656 of the Shiva Sahasranāma — Mahabharata (Anushasana Parva), as taught by Sage Tandi to Sage Upamanyu
Name 920 of the Shiva Sahasranāma — Mahabharata (Anushasana Parva), as taught by Sage Tandi to Sage Upamanyu
Name 478 of the Vishnu Sahasranāma — Mahabharata (Anushasana Parva), as taught by Bhishma to Yudhishthira on his deathbed
As a Hindi name
सत् · noun · masculine
ब्रह्म · वह जो वस्तुतः विद्यमान हो । अस्तित्व । सत्ता (को॰) · सचाई । वास्तविकता (को॰) — Śabdasāgara
सत् · adj
सत्य · साधु । सज्जन · धीर — Śabdasāgara
As a Sanskrit word
Meaning
that which really is, entity or existence, essence, the true being or really existent (in the Vedānta, ‘the self-existent or Universal Spirit, Brahma’), &c. &c.
Scripturally attested Verified derivationMultiple readings (2)Why this matches what you typed
The spelling you confirmed, सत्, is itself a dictionary headword — no grammatical transformation stands between what you typed and the meaning above.
Dictionary citations
sat mf(satī)n. (pr. p. of √ 1. as) being, existing, occurring, happening, being present (sato me, ‘when I was present’; often connected with other participles or with an adverb, e.g. nāmni kṛte sati, ‘when the name has been given’; tathā sati, ‘if it be so’; also ibc., where sometimes = ‘possessed of’, cf. sat-kalpavṛkṣa), RV. &c. &c.
abiding in (loc.), MBh.
belonging to (gen.), ŚBr.
living, MuṇḍUp.
lasting, enduring, Kāv.; RV. &c. &c.
Alternative readings
More than one analysis survives full verification. That ambiguity is real, so we show every reading rather than pick one silently.
Caveats
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