[pil-er] 
| 1. | an upright shaft or structure, of stone, brick, or other material, relatively slender in proportion to its height, and of any shape in section, used as a building support, or standing alone, as for a monument: Gothic pillars; a pillar to commemorate Columbus. |
| 2. | a natural formation resembling such a construction: a pillar of rock; a pillar of smoke. |
| 3. | any upright, supporting part; post: the pillar of a table. |
| 4. | a person who is a chief supporter of a society, state, institution, etc.: a pillar of the community. |
| 5. | Horology. any of several short parts for spacing and keeping in the proper relative positions two plates holding the bearings of a watch or clock movement. |
| 6. | Mining. an isolated mass of rock or ore in a mine, usually serving as a roof support in early operations and later removed, wholly or in part. |
| 7. | Nautical. mast 1 (def. 2). |
| 8. | to provide or support with pillars. |
| 9. | from pillar to post,
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pillar pil·lar (pĭl'ər)
n.
A structure or part that provides support and resembles a column or pillar.
ər