1. Roving, especially in search of adventure: knights errant.
2. Failing to adhere to guidelines or moral standards: errant youngsters.
a. Moving from the proper course or established limits: errant lambs.
b. Aimless or irregular in motion: an errant afternoon breeze.
c. Missing an intended target or recipient: an errant shot.
[Middle English erraunt, from Anglo-Norman, partly from Old French errer, to travel about (from Vulgar Latin *iterāre, from Latin iter, journey; see ei- in the Appendix of Indo-European roots) and partly from Old French errer, to err; see ERR.]
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