The American Heritage® Dictionary of the English Language, 4th Edition
n. The advocacy, system, or theory of protecting domestic producers by impeding or limiting, as by tariffs or quotas, the importation of foreign goods and services.
n. A policy of protecting the domestic producers of a product by imposing tariffs, quotas or other barriers on imports.
the GNU version of the Collaborative International Dictionary of English
n. The doctrine or policy of protectionists. See protection, 4.
The Century Dictionary and Cyclopedia
n. The doctrine of the protectionists; the system of protection. See protection, 4.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the policy of imposing duties or quotas on imports in order to protect home industries from overseas competition
Word Usage
"Now McCain today declaring that in his opinion the consequences of what he called protectionism and isolationism could cause immense harm to middle class Americans."