As a deity name
Name 632 of the Durga Sahasranāma — Kula Arnava Tantra / Skanda Purana, as taught by Lord Shiva to Goddess Parvati
As a Hindi name
अष्टमी · noun · feminine
शुक्ल और कृष्ण पक्ष के भेद से आठवीं तिथि । आठैं · क्षीरकाकोली । पयस्वा — Śabdasāgara
अष्टमी · adj
स्त्री॰ [सं॰] आठवीं — Śabdasāgara
अष्टमी · ashṭamī · s.f.
The eighth day (night) in a (lunar) half-month. (See janam-ashṭamī.) — Platts (1884), digital edition courtesy DSAL, University of Chicago, p. 56
Cited formation "अष्टमी" is अष्टम + -ई: अष्टम means "Eighth", and the suffix -ई forms abstract nouns (fem.). CHD Basic Grammar App. I §8(14) — cited from the extracted rule table — base gloss: Platts (1884), digital edition courtesy DSAL, University of Chicago
Cited formation "अष्टमी" is अष्टम + -ई: अष्टम means "Eighth", and the suffix -ई forms 'belonging to', 'having', 'coming from' (adjectives). CHD Basic Grammar App. I §9(6) — cited from the extracted rule table — base gloss: Platts (1884), digital edition courtesy DSAL, University of Chicago
Cited formation "अष्टमी" is अष्टम + -ई: अष्टम means "Eighth", and the suffix -ई forms diminutives (fem.). CHD Basic Grammar App. I §9(6) — cited from the extracted rule table — base gloss: Platts (1884), digital edition courtesy DSAL, University of Chicago
As a Sanskrit word
Meaning
(i.e. rātri) the eighth day (night) in a half-month, &c.
Scripturally attested Verified derivationMultiple readings (2)Why this matches what you typed
M1 · same meaning "aṣṭamī" is the feminine form of "aṣṭama" — the same word with the feminine ending, recorded by the dictionary's own gender marker on that entry.
Dictionary citations
aṣṭamī (ī), f. (i.e. rātri) the eighth day (night) in a half-month, ĀśvGṛ.; Mn. iv, 128, &c.
aṣṭama mf(ī)n. the eighth, RV. ii, 5, 2; x, 114, 9; AV. &c.;
aṣṭama (as), m. (Pāṇ. v, 3, 51 seq.) the eighth part, Mn. x, 120
Alternative readings
More than one analysis survives full verification. That ambiguity is real, so we show every reading rather than pick one silently.
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