There are 3 definitions of loon in English:

loon1

Line breaks: loon
Pronunciation: /luːn
 
/

noun

informal
  • A silly or foolish person: if only she weren’t such a lovesick loon
    More example sentences
    • Prizes should be delivered to the TV director who cut to their box in time to catch him grinning like a loon, boffing a balloon about with his feet and hands.
    • Here, a sheepish young yakuza is ordered to kill his insane boss but things go awry when his elder disappears in a town full of loons, zombies, and halfwits.
    • And for another, hanging them on your lapel makes you look like a dork, or worse yet a loon.

Origin

late 19th century: from loon2 (referring to the bird's actions when escaping from danger), perhaps influenced by loony.

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Word of the day kerf
Pronunciation: kəːf
noun
a slit made by cutting with a saw

There are 3 definitions of loon in English:

loon2

Line breaks: loon
Pronunciation: /luːn
 
/

noun

  • North American term for diver ( sense 2).
    More example sentences
    • The first, innocuous shower stroked the lake's surface but, when the wind came up, the loons began to call madly.
    • Only those who have heard the sound of a loon or a wolf call can truly sympathise with the poet about the beauty of the sound: ‘The wolves howl with a loneliness that is only theirs.’
    • This year, the artists showcased their talent with birds for a theme competition, each displaying the delicate feathers of every bird, from eagles to loons.

Origin

mid 17th century: probably by alteration of Shetland dialect loom, denoting especially a guillemot or a diver, from Old Norse.

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There are 3 definitions of loon in English:

loon3

Line breaks: loon
Pronunciation: /luːn
 
/

verb

[no object, with adverbial] British informal
  • Act in a foolish or desultory way: he decided to loon around London
    More example sentences
    • Then again, the man who turned looning into a full-time career generally looks quite vacant.
    • I had looned and lazied my way through physical childhood and the misfortune of a crazed adolescence.
    • We'd set the bands gear up and generally idle the afternoon away in the bar playing pool, looning around on the beach, and hanging out in various cafés dotted around town before the serious business of playing heavy metal started in the evening.

Origin

1960s: of unknown origin.

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