Dictionary  ver•ti•calPronunciation: (vûr'ti-kul), [key] —adj. 1. being in a position or direction perpendicular to the plane of the horizon; upright; plumb. 2. of, pertaining to, or situated at the vertex. 3. of or pertaining to the cranial vertex. 4. Bot. a. (of a leaf) having the blade in a perpendicular plane, so that neither of the surfaces can be called upper or lower. b. being in the same direction as the axis; lengthwise. 5. of, constituting, or resulting in vertical combination. 6. of or pertaining to a product or service from initial planning to sale. 7. of, pertaining to, or noting a stratified society, nation, etc. —n. 1. something vertical, as a line or plane. 2. a vertical or upright position. 3. a vertical structural member in a truss. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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