loco

[ loh-koh ]
/ ˈloʊ koʊ /

noun, plural lo·cos.

Slang. an insane person; maniac.
Veterinary Pathology. locoism.

verb (used with object), lo·coed, lo·co·ing.

to poison with locoweed.
Slang. to cause to be insane or crazy.

adjective

Slang. out of one's mind; insane; crazy.

Origin of loco

1835–45, Americanism; < Spanish: insane

Definition for loco (2 of 7)

in loco

[ in loh-koh ]
/ ɪn ˈloʊ koʊ /

adverb Latin.

in place; in the proper place.

Origin of in loco

First recorded in 1700–10

Definition for loco (3 of 7)

in loco parentis

[ in loh-koh pah-ren-tees; English in loh-koh puh-ren-tis ]
/ ɪn ˈloʊ koʊ pɑˈrɛn tis; English ɪn ˈloʊ koʊ pəˈrɛn tɪs /

adverb Latin.

in the place or role of a parent.

Definition for loco (4 of 7)

loco citato

[ loh-koh ki-tah-toh; English loh-koh sahy-tey-toh, si-tah-toh ]
/ ˈloʊ koʊ kɪˈtɑ toʊ; English ˈloʊ koʊ saɪˈteɪ toʊ, sɪˈtɑ toʊ /

adverb Latin.

Definition for loco (5 of 7)

loco primo citato

[ loh-koh pree-moh ki-tah-toh; English loh-koh prahy-moh sahy-tey-toh, pree-moh si-tah-toh ]
/ ˈloʊ koʊ ˈpri moʊ kɪˈtɑ toʊ; English ˈloʊ koʊ ˈpraɪ moʊ saɪˈteɪ toʊ, ˈpri moʊ sɪˈtɑ toʊ /

adverb Latin.

Definition for loco (6 of 7)

loco supra citato

[ loh-koh soo-prah ki-tah-toh; English loh-koh soo-pruh sahy-tey-toh, si-tah-toh ]
/ ˈloʊ koʊ ˈsu prɑ kɪˈtɑ toʊ; English ˈloʊ koʊ ˈsu prə saɪˈteɪ toʊ, sɪˈtɑ toʊ /

adverb Latin.

Definition for loco (7 of 7)

suo loco

[ soo-oh law-koh; English soo-oh loh-koh ]
/ ˈsʊ oʊ ˈlɔ koʊ; English ˈsu oʊ ˈloʊ koʊ /

adverb Latin.

in one's own or rightful place.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for loco

British Dictionary definitions for loco (1 of 6)

loco

1
/ (ˈləʊkəʊ) /

noun

informal short for locomotive

British Dictionary definitions for loco (2 of 6)

loco

2
/ (ˈləʊkəʊ) /

adjective

slang, mainly US insane
(of an animal) affected with loco disease

noun plural -cos

short for locoweed

verb (tr)

to poison with locoweed
US slang to make insane

Word Origin for loco

C19: via Mexican Spanish from Spanish: crazy

British Dictionary definitions for loco (3 of 6)

loco

3
/ (ˈləʊkəʊ) /

adjective

denoting a price for goods, esp goods to be exported, that are in a place specified or known, the buyer being responsible for all transport charges from that placeloco Bristol; a loco price

Word Origin for loco

C20: from Latin locō from a place

British Dictionary definitions for loco (4 of 6)

in loco parentis

/ Latin (ɪn ˈləʊkəʊ pəˈrɛntɪs) /

in place of a parent: said of a person acting in a parental capacity

British Dictionary definitions for loco (5 of 6)

loco citato

/ (ˈlɒkəʊ sɪˈtɑːtəʊ) /

in the place or passage quotedAbbreviation: loc. cit, lc

Word Origin for loco citato

Latin: in the place cited

British Dictionary definitions for loco (6 of 6)

suo loco

/ (ˈsuːəʊ ˈlɒkəʊ) /

adverb

mainly law in a person or thing's own or rightful place

Word Origin for suo loco

Latin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Culture definitions for loco

in loco parentis

[ (in loh-koh puh-ren-tis) ]

To assume the duties and responsibilities of a parent: “Because Jack's parents were out of town, his sister acted in loco parentis and punished him for staying out so late.” From Latin, meaning “in the place of a parent.”

Note

At one time, colleges and universities acted in loco parentis for their students, but this is no longer true.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.