Definition of portentous adjective from the Oxford Advanced American Dictionary

     

    portentous

     adjective
    adjective
    NAmE//pɔrˈtɛntəs//
     
     
    jump to other results
  1. 1(literary) important as a sign or warning of something that is going to happen in the future, especially when it is something unpleasant a portentous sign
  2. 2(formal) (disapproving) very serious and intended to impress people synonym pompous a portentous remark
portentously
 
jump to other results
 
adverb She frowned portentously to add weight to her suggestion.
portentousness
 
jump to other results
 
noun [uncountable]
See the Oxford Advanced Learner's Dictionary entry: portentous