taxation

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

• noun The act or practice of imposing taxes.
• noun The fact of being taxed.
• noun An assessed amount of tax.
• noun Revenue gained from taxes.

from The Century Dictionary.

• noun The act of laying a tax, or of imposing taxes on the subjects or citizens of a state or government, or on the members of a corporation or company, by the proper authority; the raising of revenue required for public service by means of taxes; the system by which such a revenue is raised.
• noun Tax or assessment imposed; the aggregate of particular taxes.
• noun Charge; accusation; censure; scandal.
• noun The act of taxing or assessing a bill of costs in law.

from the GNU version of the Collaborative International Dictionary of English.

• noun The act of laying a tax, or of imposing taxes, as on the subjects of a state, by government, or on the members of a corporation or company, by the proper authority; the raising of revenue; also, a system of raising revenue.
• noun (Law) The act of taxing, or assessing a bill of cost.
• noun rare Tax; sum imposed.
• noun obsolete Charge; accusation.

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

• noun The act of imposing taxes and the fact of being taxed
• noun A particular system of taxing people or companies
• noun The revenue gained from taxes

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun charge against a citizen's person or property or activity for the support of government
• noun government income due to taxation
• noun the imposition of taxes; the practice of the government in levying taxes on the subjects of a state