There are 2 definitions of loco in English:

loco1

Line breaks: loco
Pronunciation: /ˈləʊkəʊ
 
/

noun (plural locos)

informal
A locomotive: Britain’s most famous steam loco [as modifier]: loco sheds
More example sentences
  • Visitors will be able to ride behind legendary locos, visit the Great Railway Bazaar, enjoy a steam fair, folk singers, vintage films, refreshments and a display of the modern railway giving a snapshot of its current structure.
  • The locomotive was one of 20 similar express steam locos built between 1903 and 1909.
  • The historic journey marked the end of 150 years of steam trains on the Manchester to London line, although main-line service steam locos from Manchester stopped in 1968.

Origin

mid 19th century: abbreviation.

Definition of loco in:

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Word of the day flippant
Pronunciation: ˈflɪp(ə)nt
adjective
not showing a serious or respectful attitude

There are 2 definitions of loco in English:

loco2

Line breaks: loco
Pronunciation: /ˈləʊkəʊ
 
/

adjective

informal
Crazy.
More example sentences
  • Along with five equally loco Norwegians and a parrot, he survives on fish that literally hurl themselves on deck, meets up with a few sharks, and endures a beaching in Tahiti.
  • If true, this would not only be one of the most loco funding stories, but it gives more credence to the idea of a poker bubble, in which everyone and their mother is either playing poker or launching some kind of poker venture.
  • On the couch one evening, our loco analysand is seized by an uncontrollable passion for the ancient medico.

Origin

late 19th century: from Spanish, 'insane'.

Definition of loco in: