moo

Noun (1)

moo (plural moos)

1. (onomatopoeic) The characteristic lowing sound made by cattle.
2. (UK, derogatory, mildly, slang) A foolish woman.
   • You silly moo! What did you do that for?
   • 'Aurora House does not expel,' said the sanctimonious moo, 'but you will be medicated, if your behaviour warrants it, for your own protection.'2004, David Mitchell, Cloud Atlas, London: Sceptre (Hodder and Stoughton), →ISBN

Verb

moo (third-person singular simple present moos, present participle mooing, simple past and past participle mooed)

1. (intransitive) Of a cow or bull, to make its characteristic lowing sound.

   Synonyms:

   low, boo

Interjection

1. The characteristic sound made by a cow or bull.
   • The cow says moo.

Proper noun (1) capitalized: MOO

MOO

1. (abbreviation, initialism) Initialism of Master of Orion.

Noun (2) capitalized: MOO

MOO

1. (abbreviation, initialism) Initialism of matter of opinion.
2. (abbreviation, initialism) Initialism of MUD, object-oriented.
3. (abbreviation, dated, initialism, postal) Initialism of Money Order Office.
   • […](3) the nature of the Postal business accommodation supplied by the local Post-Office—thus, PO (Post-Office), SB (Savings Bank), MOO (Money Order Office), or, if there be no PO, the name and distance of the nearest PO[…]1893, George A. de M. Edwin Dagg, "Devia Hibernia" : the road and route guide for Ireland of the Royal Irish Constabulary, page vi
   • It was to help solve a serious problem – mice. For the little vermin were chewing letters containing banknotes and postal orders, especially at the Money Order Office (MOO).1993, Christopher Browne, Getting the Message: The Story of the British Post Office, page 88
4. (abbreviation, initialism) Initialism of massive overdense object.

Proper noun (2) capitalized: Moo

Moo (plural Moos)

1. A surname.