1.  in the least(r = adv.all) even a little - to any extent at all; "are you in the least interested?"

2.  in the least(r = adv.all) at all, the least bit - in the slightest degree or in any respect; "Are you at all interested? No, not at all"; "was not in the least unfriendly"

at least, at the least, last but not least, last not least, least, least bittern, least common multiple, least effort, least of all, least resistance, least sandpiper, least shrew, least squares, line of least resistance, method of least squares, new world least weasel, old world least weasel, path of least resistance, the least bit