The usual Old English word for cloud was weolcan. In Middle English, skie also originally meant cloud. The four fundamental types of cloud classification (cirrus, cumulus, stratus, nimbus) were proposed by British amateur meteorologist Luke Howard (1772-1864) in 1802. Figuratively, as something that casts a shadow, from early 15c.; hence under a cloud (c.1500).
Thanks for the A2A. Okay, the most famous song in the world is no doubt 'Happy Birthday', followed by various Christmas carols (since the majority of human population is Christian indeed and since Santa is a really famous guy), folk songs, army marches and national anthems.
CBC Radio listeners voted this the best Canadian song of all time in a 2005 poll for 50 Tracks: The Canadian Version, and with good reason. The iconic sixties folk classic by Torontoâs Ian and Sylvia remains one of the most beautiful and heartbreaking things to ever come out of this country.