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Definition of plus 1 preposition from the Oxford Advanced Learner's Dictionary

plus1

preposition
 
/plʌs/
 
/plʌs/
Idioms
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  1. used when the two numbers or amounts mentioned are being added together
    • Two plus five is seven.
    • The cost is £22, plus £1 for postage.
    • Membership is 350 dollars per year plus tax.
    Topics Maths and measurementb1
  2. as well as something/somebody; and also
    • We have to fit five of us plus all our gear in the car.
  3. opposite minus
    Word Originmid 16th cent.: from Latin, literally ‘more’.
Idioms
plus or minus
  1. used when the number mentioned may actually be more or less by a particular amount
    • The margin of error was plus or minus three percentage points.
    compare give or take
See plus in the Oxford Advanced American DictionarySee plus in the Oxford Learner's Dictionary of Academic English
sufficiently
adverb
 
 
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OPAL written words
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