As a Hindi name
दीपिका · noun · feminine
छोटा दीया · एक रागिनी जो हिंडोल राग की पत्नी मानी जाती है और प्रदोषकाल में गाई जाती है · चाँदनी । चंद्रमा का प्रकाश — Śabdasāgara
दीपिका · adj
स्त्री॰ · प्रकाश करनेवाली । उजाला फैलानेवाली · स्पष्ट कहनेवाली — Śabdasāgara
दीपिका · dīpikā · s.f.
A light, lamp — Platts (1884), digital edition courtesy DSAL, University of Chicago, p. 555
दीपिका · feminine
a female given name, Deepika, from Sanskrit
दीपिका · feminine
light, lamp
a Hindi word, a tatsama: the Sanskrit word borrowed unchanged into Hindi दीपिका — per Wiktionary’s etymology record
“Borrowed from Sanskrit दीपिका (dīpikā).” — per Wiktionary’s etymology record
dīpikā f. a light, lamp, lantern, Hariv.; Kāv. &c.
moonlight, W.
As a Sanskrit word
Meaning
a light, lamp, lantern, &c.
Verified derivationWhy this matches what you typed
The spelling you confirmed, दीपिका, is itself a dictionary headword — no grammatical transformation stands between what you typed and the meaning above.
Dictionary citations
dīpikā f. a light, lamp, lantern, Hariv.; Kāv. &c.
moonlight, W.
‘illustrator’ or ‘illustration’ at the end of titles of books (cf. kula-, gūḍhārtha-, trailokya-) and also alone, N. of works. (see below)
Ptychotis Ajowan or the root of Calamus, L.
(in music) N. of a Rāgiṇī
Caveats
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