As a deity name
Name 532 of the Narasimha Sahasranāma — Brahmanda Purana / Narasimha Purana, as taught by Sages to Assembly of Devotees
Name 433 of the Rama Sahasranāma — Padma Purana / Skanda Purana, as taught by Lord Shiva to Goddess Parvati
Name 905 of the Shiva Sahasranāma — Mahabharata (Anushasana Parva), as taught by Sage Tandi to Sage Upamanyu
Name 151 of the Surya Sahasranāma — Bhavishya Purana, as taught by Lord Brahma / Sages
As a Hindi name
ऋतु · noun · masculine
प्राकृतिक अवस्थाओं के अनुसार वर्ष के दो दो महीनों के छह विभाग । मौसम · रजोदर्शन के उपरांत वह काल जिसमें स्त्रियाँ गर्भधारण के योग्य होती हैं · उपयुक्त समय या काल (को॰) — Śabdasāgara
ऋतु · r̤itu · s.m.
(generally f. in Urdū; see rut), Settled point of time, fixed time; right time, fit season; season (of the year) — Platts (1884), digital edition courtesy DSAL, University of Chicago, p. 587
ऋतु · feminine
a female given name, Ritu, from Sanskrit
ऋतु · feminine
season; a particular measure of time (= 2 māsas), equalling 60 days
a Hindi word, a tatsama: the Sanskrit word borrowed unchanged into Hindi ऋ॒तु — per Wiktionary’s etymology record
“Learned borrowing from Sanskrit ऋ॒तु (ṛtú). Doublet of रुत (rut), a tadbhava.” — per Wiktionary’s etymology record
As a Sanskrit word
Meaning
an epoch, period (esp. a division or part of the year), season (the number of the divisions of the year is in ancient times, three, five, six, seven, twelve, thirteen, and twenty-f…
Scripturally attested Verified derivationMultiple readings (2)Why this matches what you typed
The spelling you confirmed, ऋतु, is itself a dictionary headword — no grammatical transformation stands between what you typed and the meaning above.
Dictionary citations
ṛtu (us), m. (Uṇ. i, 72) any settled point of time, fixed time, time appointed for any action (esp. for sacrifices and other regular worship), right or fit time, RV.; AV.; VS.
an epoch, period (esp. a division or part of the year), season (the number of the divisions of the year is in ancient times, three, five, six, seven, twelve, thirteen, and twenty-four; in later time six seasons are enumerated, viz. Vasanta, ‘spring’; Grīṣma, ‘the hot season’; Varṣās (f. pl. nom.), ‘the rainy season’ Śarad, ‘autumn’; Hemanta, ‘winter’; and Śiśira, ‘the cool season’; the seasons are not unfrequently personified, addressed in Mantras, and worshipped by libations), RV.; AV.; VS. &c., MBh.; Mn. &c.
symbolical expression for the number six, VarBṛS.; Sūryas. &c.
the menstrual discharge (in women), the time after the courses (favourable for procreation; according to Bhpr. sixteen days after their appearance), Suśr.; MBh.; Mn. &c.
sexual union at the above time, Mn. ix, 93; MBh.
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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