adjective
    
    always used before a noun
    
    occurring at the beginning of something
    
    
    
    
    
    noun
    
    plural -tials
    
    [count] :a first letter of a name
    
    
    
    initials [plural] :the first letters of each of a person's names
    
    
    
    
    
    verb
    
    -tials; US -tialed or Brit -tialled; US -tialing or Brit -tialling
    
    [+ obj] :to mark (something) with your initials