blasé

American Heritage® Dictionary of the English Language, Fourth Edition

1. adj. Uninterested because of frequent exposure or indulgence.
2. adj. Unconcerned; nonchalant: had a blasé attitude about housecleaning.
3. adj. Very sophisticated.

Century Dictionary and Cyclopedia

1. Exhausted by enjoyment, especially by sensuous pleasures; having the healthy energies exhausted; weary and disgusted with life.

Wiktionary

1. adj. Unimpressed with something because of over-familiarity.

GNU Webster's 1913

1. adj. Having the sensibilities deadened by excess or frequency of enjoyment; sated or surfeited with pleasure; uninterested because of frequent exposure or indulgence; used up.
2. adj. very sophisticated; versed in the ways of the world.
3. adj. uninterested and attaching little importance; -- of attitudes toward duties.

WordNet 3.0

1. adj. very sophisticated especially because of surfeit; versed in the ways of the world
2. adj. nonchalantly unconcerned
3. adj. uninterested because of frequent exposure or indulgence