The physics definition of period is the duration of one complete cycle of a wave or oscillation.
Federalism- a form of government where a group of states, territories, etc., are governed by one central power. Federalists- a member of the Federalist party. Dual Federalism-the federal government and the statesâ government have separate, but equal, powers.
noun. Federalism is a strong main government. Federalism is a strong main government. Federalism is defined as a system of government where there is one strong, central controlling authority, or the principles of a political party called the Federalists.plural federalisms). 1  System of national government in which power is divided between a central authority and a number of regions with delimited self-governing authority. 2  Advocacy of such a system.