pi definition, pi meaning | English dictionary

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Collins
pi         

[

1]  

      n   pl   , pis  
1    the 16th letter in the Greek alphabet (Π, π), a consonant, transliterated as p  
2      (Maths)   a transcendental number, fundamental to mathematics, that is the ratio of the circumference of a circle to its diameter. Approximate value: 3.141592...; symbol: π  
     (C18 (mathematical use): representing the first letter of Greek periphereia periphery)  
English Collins Dictionary - English Definition & Thesaurus  
Collins
pi          [2]   , pie  
      n   pl   , pies  
1    a jumbled pile of printer's type  
2    a jumbled mixture  
      vb   , pies, piing, pied, pies, pieing, pied   tr  
3    to spill and mix (set type) indiscriminately  
4    to mix up  
     (C17: of uncertain origin)  

English Collins Dictionary - English Definition & Thesaurus  

Collins
pi          [3]  
      adj     (Brit)  
slang      short for       pious       2, 3  

English Collins Dictionary - English Definition & Thesaurus  

Collins
PI         
      abbrev. for  
1    Philippine Islands  
2    private investigator  


pi   [1]  
      n   pl   , pis  
1    the 16th letter in the Greek alphabet (Π, π), a consonant, transliterated as p  
2      (Maths)   a transcendental number, fundamental to mathematics, that is the ratio of the circumference of a circle to its diameter. Approximate value: 3.141592...; symbol: π  
     (C18 (mathematical use): representing the first letter of Greek periphereia periphery)  
pi   [2]   , pie  
      n   pl   , pies  
1    a jumbled pile of printer's type  
2    a jumbled mixture  
      vb   , pies, piing, pied, pies, pieing, pied   tr  
3    to spill and mix (set type) indiscriminately  
4    to mix up  
     (C17: of uncertain origin)  
pi   [3]  
      adj     (Brit)  
slang      short for       pious       2, 3  
pi character  
      n     (Printing)   any special character, such as an accent or mathematical symbol, which is not normally obtained in a standard type fount  
pi-dog  
      n      a variant spelling of       pye-dog  
pi meson  
      n      another name for       pion  

English Collins Dictionary - English Definition & Thesaurus  

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