Definition of Pillar

Noun: pillar pi-lu(r)

A fundamental principle or practice
"science eroded the pillars of superstition"
Anything that approximates the shape of a column or tower
"a thin pillar of smoke betrayed their campsite";
- column, tower
A prominent supporter
"he is a pillar of the community";
- mainstay
A vertical cylindrical structure standing alone and not supporting anything (such as a monument)
- column
(architecture) a tall vertical cylindrical structure standing upright and used to support a structure
- column