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Grade 4
Sep 1, 2022

 What is an Abbreviation?  

  • An abbreviation is a shortened form of a word.  
  • We use it to make words smaller and thus make smaller sentences.  
  • They make sentences easier to read.  

Acronyms and Initialism  


  • We combine the initial letter of each word into a longer name with all capital letters.  


  • NASANational  Aeronautics and Space  Administration.  
  • RADAR Radio Detection And Ranging 
  • LaserLight Amplification by  Stimulated Emission of  Radiation


  • Initialisms are similar to acronyms. They are also formed using the first letter of each word in a longer phrase.  
  • Unlike acronyms, however, initialism are pronounced as a series of letters.   
  • NFL (National Football League)  

Abbreviations for Courtesy Titles and Academic Degrees  

  • Mister – Mr  
  • Miss – Ms  
  • Mistress – Mrs  
  • Junior – Jr  
  • Senior – Sr  
  • Bachelor of Arts – BA  
  • Master of Arts – MA  
  • Doctor of philosophy –PhD   
  • Master of Business Administration -MBA  

Abbreviations derived from Latin  

e.g.: exempli gratia It means “for example.”  

etc.: et cetera It means “and so forth.”  

i.e.: id est It means “that is.”  


  • U.K. (United Kingdom)  
  • E.U. (European Union)  

Times and dates  

  • Jan., Feb., Mar., Apr., May, Jun., Jul., Aug., Sep., Oct., Nov., Dec.  
  • I was born on Nov. 24, 2011.  
  • Mon., Tues., Wed., Thurs., Fri., Sat., Sun.  
  • The show will run Mon.-Fri. next week.  
  • p.m. (post meridiem) = after noon  
  • a.m. (ante meridiem) = before noon  
  • The mall opens at 9 a.m. and closes at 7 p.m.  
  • U.A.E. (United Arab Emirates)  
  • U.S. (United States)  
  • Units of Measurement  
  • in. (inches)  
  • ft. (feet)  
  • lbs. (pounds)  
  • mm. (millimeters)  
  • cm. (centimeters)  
  • m. (meters)  
  • mg. (milligram) 
  • g. (gram)  
  • kg. (kilogram)  

I weigh 110 lbs., which is about 50 kg. 



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