main

Adjective

• of force; of the greatest possible intensity
  • by main strength
    

• (of a clause) capable of standing syntactically alone as a complete sentence
  • the main (or independent) clause in a complex sentence has at least a subject and a verb
    

• most important element
  • the chief aim of living
    
  • the main doors were of solid glass
    
  • the principal rivers of America
    
  • the principal example
    
  • policemen were primary targets
    
  • the master bedroom
    
  • a master switch
    

Noun

• a principal pipe in a system that distributes water or gas or electricity or that collects sewage

• any very large body of (salt) water

Related words

• Synonyms: 
  main(a) , independent , chief(a) , primary(a) , principal(a) , master(a) , briny
• Antonyms: 
  dependent , subordinate