'Luny' definitions:
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Luny \Lu"ny\, a. [Shortened fr. lunatic.]
Crazy; insane; mentally unsound. [Written also loony and
looney.] [Low, U.S.]
[1913 Webster]
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loony \loon"y\ (l[=oo]n"[y^]), a. [Shortened fr. lunatic.]
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1. Crazy; insane; lunatic; mentally unsound. [Low, U.S.]
[Written also loony, luny and looney.] See Luny.
[1913 Webster]
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2. Very foolish; very impractical; as, loony ideas.
[PJC]