As a deity name
Name 715 of the Ganesha Sahasranāma — Ganesha Purana (Upasana Khanda), as taught by Sage Vyasa / Lord Ganesha
Name 924 of the Gopal Sahasranāma — Sammohana Tantra, as taught by Lord Shiva to Goddess Parvati
As a Hindi name
लग्न · noun · masculine
ज्योतिष में दिन का उतना अंश, जितने में किसी एक राशि का उदय रहता है · ज्योतिष के अनुसार कोई शुभ कार्य करने का मुहूर्त · विवाह का समय — Śabdasāgara
लग्न · adj
लगा हुआ । मिला हुआ · लज्जित । शरमिंदा · आसक्त — Śabdasāgara
लग्न · masculine
wedding
Platts (p. 962) also records: Attached (to), joined (to), connected (with), applying (to); adhering (to)
Cited formation "लग्न" is लग्ना + -न: लग्ना means "(of lagna, q.v.), A female bard, a poetess", and the suffix -न forms abstract nouns (masc. or fem.). CHD Basic Grammar App. I §8(18) — cited from the extracted rule table — base gloss: Platts (1884), digital edition courtesy DSAL, University of Chicago
a Hindi word, a tatsama: the Sanskrit word borrowed unchanged into Hindi लग्न — per Wiktionary’s etymology record
“Borrowed from Sanskrit लग्न (lagna). Cognate with Konkani लग्न (lagna), Marathi लग्न (lagna).” — per Wiktionary’s etymology record
1. lagna mfn. (for 2. See p. 895, col. 2) adhered, adhering or clinging to, attached to, sticking or remaining in, fixed on, intent on, clasping, touching, following closely (with gen. or ifc.), MBh.; Kāv. &c. (with pṛṣṭhe, pṛṣṭha-tas; or pṛṣṭha ibc., following on a person's heels; with mārge, sticking to i.e. following the road; with hṛdaye, one who has penetrated the heart)
one who has entered on a course of action, one who has begun to (inf.), Pañcat.
As a Sanskrit word
Meaning
the point or arc of the equator which corresponds to a given point or arc of the ecliptic
Scripturally attested Verified derivationMultiple readings (3)Why this matches what you typed
The spelling you confirmed, लग्न, is itself a dictionary headword — no grammatical transformation stands between what you typed and the meaning above.
Dictionary citations
1. lagna mfn. (for 2. See p. 895, col. 2) adhered, adhering or clinging to, attached to, sticking or remaining in, fixed on, intent on, clasping, touching, following closely (with gen. or ifc.), MBh.; Kāv. &c. (with pṛṣṭhe, pṛṣṭha-tas; or pṛṣṭha ibc., following on a person's heels; with mārge, sticking to i.e. following the road; with hṛdaye, one who has penetrated the heart)
one who has entered on a course of action, one who has begun to (inf.), Pañcat.
meeting, intersecting, cutting (said of lines), Gol.
immediately ensuing, Pañcat.
passed (as days), Vet.
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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