source: By Pieter Bruegel the Elder - Levels adjusted from File:Pieter_Bruegel_the_Elder_-_The_Tower_of_Babel_(Vienna)_-_Google_Art_Project.jpg, originally from Google Art Project., Public Domain

GRAND, MAGNIFICENT, IMPOSING, STATELY, MAJESTIC, GRANDIOSE mean large and impressive.

GRAND adds to greatness of size the implications of handsomeness and dignity.

e.g. a grand staircase

MAGNIFICENT implies an impressive largeness proportionate to scale without sacrifice of dignity or good taste.

e.g. magnificent paintings

IMPOSING implies great size and dignity but especially stresses impressiveness.

e.g. an imposing edifice

STATELY may suggest poised dignity, erectness of bearing, handsomeness of proportions, ceremonious deliberation of movement.

e.g. the stately procession

MAJESTIC combines the implications of IMPOSING and STATELY and usually adds a suggestion of solemn grandeur.

e.g. a majestic waterfall

GRANDIOSE implies a size or scope exceeding ordinary experience but is most commonly applied derogatorily to inflated pretension or absurd exaggeration.

e.g. grandiose hydroelectric projects

e.g. grandiose schemes

impressive and imposing in appearance or style, especially pretentiously so:

〈建築物などが〉巨大な; 〈金額などが〉莫大な

e.g. the court's grandiose facade.

excessively grand or ambitious:

｟しばしば非難して｠ (非現実的な程)〈計画･表現などが〉壮大な, 大げさな

e.g. grandiose plans to reform the world.

grandiosely adverb

mid 19th century: from French, from Italian grandioso, from grande ‘grand’.