As a deity name
Name 773 of the Ganesha Sahasranāma — Ganesha Purana (Upasana Khanda), as taught by Sage Vyasa / Lord Ganesha
Name 915 of the Hanuman Sahasranāma — Rasvin Samhita / Brahmanda Purana, as taught by Lord Ram / Sages
Name 6 of the Rama Sahasranāma — Padma Purana / Skanda Purana, as taught by Lord Shiva to Goddess Parvati
As a Hindi name
सदाचार · noun · masculine
अच्छा आचरण । सात्विक व्यवहार । सद्वृत्ति · शिष्ट व्यवहार । भलमनसाहत · रीति । रवाज — Śabdasāgara
सदाचार · sadāćar
= S سداتما सदात्मा sadātmā, See s.v. sat, 'real,' &c — Platts (1884), digital edition courtesy DSAL, University of Chicago, p. 645
सदाचार · masculine
morality, virtue
a Hindi word; it is not Sanskrit
As a Sanskrit word
Meaning
practice of good men, virtuous conduct, good manners, approved usage, &c.
Scripturally attested Verified derivationMultiple readings (5)Why this matches what you typed
The spelling you confirmed, सदाचार, is itself a dictionary headword — no grammatical transformation stands between what you typed and the meaning above.
Dictionary citations
sad—ācāra m. practice of good men, virtuous conduct, good manners, approved usage, Mn.; Yājñ.; Kāv. &c.
N. of wk.
sad—ācāra mf(ā)n. well-conducted, virtuous, Kathās.; Rājat. &c.
sadācāra m. (-raḥ) The traditionary observances of the Hindu castes, as preserved in the land lying between the Sarasvatī and Dṛṣadvatī rivers. 2 Virtuous conduct. E. sat pure, virtuous, and ācāra observance.
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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