WordWeb Online

1. Lack of elegance as a consequence of being pompous and puffed up with vanity
   "a charming host without any touch of stiffness or pretentiousness";
   - ostentation, ostentatiousness, pomposity, pompousness, puffiness, splashiness, inflation
    
2. The quality of being pretentious (behaving or speaking in such a manner as to create a false appearance of great importance or worth)
   - pretension, largeness

Type of: inelegance, unnaturalness

Antonym: unpretentiousness

Encyclopedia: Pretentiousness