Pillar
WordNet
noun
(1) (architeture) a tall cylindrical vertical upright and used to support a structure
(2) A vertical cylindrical structure standing alone and not supporting anything (such as a monument)
(3) A fundamental principle or practice
"Science eroded the pillars of superstition"
(4) A prominent supporter
"He is a pillar of the community"
(5) Anything tall and relatively thin that approximates the shape of a column or tower
"The test tube held a column of white powder"
"A tower of dust rose above the horizon"
"A thin pillar of smoke betrayed their campsite"
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