Meaning
A chart affliction or defect caused by a malefic planet in a sensitive position.
Etymology
Sanskrit doṣa (fault, blemish, defect) — a chart affliction caused by the placement of a malefic planet in sensitive positions.
Detailed Explanation
In Vedic astrology, a dosha is a specific planetary affliction that classically creates difficulties in a particular life domain. The most commonly discussed doshas are Mangal Dosha (Mars in houses 1, 4, 7, 8, or 12, affecting marriage), Kaal Sarp Dosha (all planets between Rahu and Ketu), Pitru Dosha (affliction to the ninth house/lord), and Grahan Dosha (eclipse-related placements). Each dosha has recognized remedial measures (upayas). Not all astrologers acknowledge every named dosha equally — Mangal Dosha has the broadest classical support.