"pillars" in the noun sense
a fundamental principle or practice
"science eroded the pillars of superstition"
2. column, tower, pillar
anything 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"
3. pillar, mainstay
a prominent supporter
"he is a pillar of the community"
4. column, pillar
a vertical cylindrical structure standing alone and not supporting anything (such as a monument)
5. column, pillar
architecture) a tall vertical cylindrical structure standing upright and used to support a structure
Source: WordNet® (An amazing lexical database of English)
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