business class

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A class of passenger accommodations on a commercial airplane or other conveyance that is intermediate in expense and service between first and coach class, typically offering more space than coach class and less luxurious service than first class.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A high-quality class of travelling (especially in airlines), higher than economy class or budget, lower than first class.