1. Exhibiting self-importance
   - boastful, braggart, bragging, braggy, big, crowing, self-aggrandizing, self-aggrandising [Brit] 
2. Full of high-spirited delight
   - elated, gleeful, joyful, jubilant, on top of the world

See also: joyous, proud

• multiplex operation
• multiplexer
• multiplicable
• multiplicand
• multiplication
• multiplication sign
• multiplication table
• multiplicative
• multiplicative inverse
• multiplicatively
• multiplicity
• multiplied
• multiplier
• multiplier factor
• multiplier onion
• multiply
• multipolar
• multipotent
• multiprocessing
• multiprocessor
• multiprogramming
• multipurpose
• multiracial
• multistage
• multistage rocket