adjective

1. higher in rank, status, or dignity than others having the same title a grand duke
2. most important; chief; main; principal the grand ballroom
3. imposing because of great size, beauty, and extent; magnificent grand scenery
4. handsome and luxurious; characterized by splendor and display a grand banquet
5. eminent; distinguished; illustrious
6. self-important; pretentious; haughty
7. lofty and dignified, as in style
8. complete; overall the grand total
9. Informal very good; excellent, delightful, admirable, etc.: a general term of approval
10. Music full; complete a grand chorus

Etymology: ME graunt < OFr grand, grant < L grandis, full-grown, great (replacing magnus in LL & Romance languages), prob. < IE base *gwrendh-, to swell up > Gr brenthos, pride

noun

1. grand piano
2. pl. grand☆ Slang a thousand dollars