As a deity name
Name 710 of the Ganesha Sahasranāma — Ganesha Purana (Upasana Khanda), as taught by Sage Vyasa / Lord Ganesha
Name 920 of the Gopal Sahasranāma — Sammohana Tantra, as taught by Lord Shiva to Goddess Parvati
As a Hindi name
तिथि · noun · masculine
चंद्रमा की कला के घटने या बढ़ने के अनुसार गिने जानेवाले महीने का दिन । चांद्रमास के अलग अलग दिन जिनके नाम संख्या के अनुसार होते हैं । मिति । तारीख · पंद्रह की संख्या — Śabdasāgara
तिथि · tithi · s.f.
A lunar day, the thirtieth part of a whole lunation; day (of the month), date ( = tārīḵẖ) — Platts (1884), digital edition courtesy DSAL, University of Chicago, p. 310
तिथि · feminine
date; tithi; lunar day
a Hindi word, a tatsama: the Sanskrit word borrowed unchanged into Hindi तिथि — per Wiktionary’s etymology record
“Borrowed from Sanskrit तिथि (tithi).” — per Wiktionary’s etymology record
tithi m. f. (Siddh. stry. 25) a lunar day (30th part of a whole lunation of rather more than 27 solar days; 15 Tithis, during the moon's increase, constitute the light half of the month and the other 15 the dark half; the auspicious Tithis are Nandā, Bhadrā, Vijayā, Pūrṇā, VarBṛS. ic, 2), Gobh. i f.; ŚāṅkhGṛ.; Mn. &c.
the number 15 VarBṛS.; VarBṛ.; Laghuj.; Sūryas.
As a Sanskrit word
Meaning
a lunar day (30th part of a whole lunation of rather more than 27 solar days; 15 Tithis, during the moon's increase, constitute the light half of the month and the other 15 the dar…
Scripturally attested Verified derivationWhy this matches what you typed
M1 · same meaning "tithi" is the vocative of "tithī" — the same word in a different grammatical case.
Gender counterpart
The kosha attests this stem in the feminine and the masculine — the same name serves without alteration.
Dictionary citations
tithi m. f. (Siddh. stry. 25) a lunar day (30th part of a whole lunation of rather more than 27 solar days; 15 Tithis, during the moon's increase, constitute the light half of the month and the other 15 the dark half; the auspicious Tithis are Nandā, Bhadrā, Vijayā, Pūrṇā, VarBṛS. ic, 2), Gobh. i f.; ŚāṅkhGṛ.; Mn. &c.
the number 15 VarBṛS.; VarBṛ.; Laghuj.; Sūryas.
cf. janma-, dus-, mahā-.
tithi mf. (-thiḥ-thiḥ or -thī) A lunar day, (1/30)th of a whole lunation. E. ata to go, to proceed, affix ithin and the radical initial rejected; also ṅīṣ being added tithī.
tithī f. a lunar day, MBh. xiii, 4238.
Caveats
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