As a deity name
Name 731 of the Vishnu Sahasranāma — Mahabharata (Anushasana Parva), as taught by Bhishma to Yudhishthira on his deathbed
As a Hindi name
तत् · pron
उस — Śabdasāgara
तत् · tat · adj.
That; his, &c. (occurring only in comp.) — Platts (1884), digital edition courtesy DSAL, University of Chicago, p. 310
As a Sanskrit word
Meaning
for tad. See col. 3.
Scripturally attested Verified derivationWhy this matches what you typed
M1 · same meaning "tat" is the vocative of "tad" — the same word in a different grammatical case.
Dictionary citations
1. tat for tad. See col. 3.
2. tat, 1. tata. See √ tan
1. tat in comp. for tad.
2. tat mfn. ifc. See parī-
cf. purī-tat.
tad (nom. and acc. sg. n. of and base in comp. for 2. ta from which latter all the cases of this pron. are formed except nom. sg. m. sas or sa & f. sā; instr. pl. tais, AV. &c.; Ved. tebhis, RV.; AV. &c.) m. he f. she n. it, that, this (often correlative of ya generally standing in the preceding clause, e.g. yasya buddhiḥ sa balavān, ‘of whom there is intellect he is strong’; sometimes, for the sake of emphasis, connected with the 1st and 2nd personal pronouns, with other demonstratives and with relatives, e.g. so 'ham, ‘I that very person, I myself’ [tasya = mama, Nal. xv, 10]; tāv imau, ‘those very two’; tad etad ākhyānam, ‘that very tale’, AitBr. vii, 18; yat tat kāraṇam, ‘that very reason which’, Mn. i, 11; yā sā śrī, ‘that very fortune which’, MBh. vii, 427), RV. &c.
tad (tad) n. this world (cf. idam), R. vi, 102, 25
Caveats
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