Of, involving, or constituting a cause: a causal relationship between scarcity of goods and higher prices.
Indicative of or expressing a cause.
A word or grammatical element, such as since or because, expressing a cause or reason.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.