significant

Adjective

• rich in significance or implication
  • a meaning look
    

• too closely correlated to be attributed to chance and therefore indicating a systematic relation
  • the interaction effect is significant at the .01 level
    
  • no significant difference was found
    

• fairly large
  • won by a substantial margin
    

• important in effect or meaning
  • a significant change in tax laws
    
  • a significant change in the Constitution
    
  • a significant contribution
    
  • significant details
    
  • statistically significant
    

Related words

• Synonyms: 
  meaning(a) , pregnant , substantial , important
• Antonyms: 
  nonsignificant , insignificant , unimportant