imposition

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

• noun The act of imposing or the condition of being imposed.
• noun Something imposed, such as a tax, an undue burden, or a fraud.
• noun A burdensome or unfair demand, as upon someone's time.
• noun The arrangement of printed matter to form a sequence of pages.

from The Century Dictionary.

• noun A placing, putting, or laying on: as, the imposition of hands in ordination or confirmation.
• noun The act of positing or fixing; affixment; attachment: with on or upon.
• noun A laying or placing as a burden or obligation; the act of levying, enjoining, enforcing, or inflicting: as, the imposition of taxes or of laws.
• noun In printing, the laying of pages of type or plates upon an imposing-stone or the bed of a press, and securing them in a chase. See impose, v. t., 6.
• noun That which is laid on, enjoined, levied, enforced, or inflicted, as a burden, tax, duty, or restriction; specifically (in the plural), in English history, duties upon imports and exports imposed at the pleasure of the king.
• noun A trick or deception; a fraud; an imposture.
• noun An exercise imposed upon a student as a punishment; a task.

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

• noun The act of imposing, laying on, affixing, enjoining, inflicting, obtruding, and the like.
• noun That which is imposed, levied, or enjoined; charge; burden; injunction; tax.
• noun (Eng. Univ.) An extra exercise enjoined on students as a punishment.
• noun An excessive, arbitrary, or unlawful exaction; hence, a trick or deception put on laid on others; cheating; fraud; delusion; imposture.
• noun (Eccl.) The act of laying on the hands as a religious ceremoy, in ordination, confirmation, etc.
• noun (Print.) The act or process of imosing pages or columns of type. See Impose, v. t., 4.

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

• noun The act of imposing, laying on, affixing, enjoining, inflicting, obtruding, and the like.
• noun That which is imposed, levied, or enjoined.
• noun An excessive, arbitrary, or unlawful exaction; hence, a trick or deception put or laid on others.
• noun printing Arrangement of a printed product’s pages on the printer's sheet so as to have the pages in proper order in the final product.
• noun religion A practice of laying hands on a person in a religious ceremony; used e.g. in confirmation and ordination.
• noun UK A task imposed on a student as punishment.

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

• noun the act of imposing something (as a tax or an embargo)
• noun an uncalled-for burden