fourth(redirected from 4)
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1. Coming after third, as in order, place, rank, time, or quality.
2. Being the digit that is next to and on the outermost side of the third digit, as on a foot.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.