From colloquial + -ly.

• (Received Pronunciation) IPA^(key): /kəˈləʊ.kwɪəli/

• Audio (Southern England):

  (file)

• (General American) IPA^(key): /kəˈloʊ.kwi.əli/

colloquially (comparative more colloquially, superlative most colloquially)

1. In a colloquial manner.

   Cattle, colloquially referred to as cows, are domesticated ungulates.

   • 1955 July, “The Last Elevated Line in New York”, in Railway Magazine, page 444:

     Known colloquially as the "El," the elevated lines constituted the earliest attempt to remove urban passenger traffic from the streets.

   • 2025 April 8, Joshua Korber Hoffman, “The ‘Shinkansen kiss’: Japan’s little-known rail spectacle that attracts trainspotters from around the world”, in CNN‎^[1]:

     The technical term for the event is “coupling,” but it is known colloquially as the “Shinkansen kiss.” For Japanese rail fans, it’s a big deal. For foreigners, it is a unique insight into the quintessentially Japanese experience of trainspotting.