chief·ly (chēf'lē)
adv.

1. Above all; especially.
2. Almost entirely; mainly.

adj.
Of or relating to a chief: chiefly responsibilities.

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The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.

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