Dictionary.com
Thesaurus.com
Synonyms

bobby

1 American  
[bob-ee] / ˈbɒb i /

noun

British Informal.

plural

bobbies
  1. a policeman.


Bobby 2 American  
[bob-ee] / ˈbɒb i /
Or Bobbie

noun

  1. a first name, often a form of Robert or Roberta.


bobby British  
/ ˈbɒbɪ /

noun

  1. informal a British policeman

"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

Etymology

Origin of bobby

1835–45; special use of Bobby, for Sir Robert Peel, who set up the Metropolitan Police system of London in 1828