Com*bust" (?), a. [L. combustus, p. p. of comburere to burn up; com- + burere (only in comp.), of uncertian origin; cf. bustum fineral pyre, prurire to itch, pruna a live coal, Gr. firebrand, Skr. plush to burn.]
So near the sun as to be obscured or eclipsed by his light, as the moon or planets when not more than eight degrees and a half from the sun.
Planets that are oft combust.
© Webster 1913.