pillar > define

noun

• A fundamental principle or practice.
  • usage: "science eroded the pillars of superstition"
• Anything that approximates the shape of a column or tower.
  • usage: "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"
  • synonyms: column, tower
• A prominent supporter.
  • usage: "he is a pillar of the community"
  • synonyms: mainstay
• A vertical cylindrical structure standing alone and not supporting anything (such as a monument.
  • synonyms: column
• Architecture) a tall vertical cylindrical structure standing upright and used to support a structure. (.
  • synonyms: column

• (n.) The general and popular term for a firm, upright, insulated support for a superstructure; a pier, column or post; also, a column or shaft not supporting a superstructure, as one erected for a monument or an ornament.
• (n.) A portable ornamental column, formerly carried before a cardinal, as emblematic of his support to the church.
• (n.) Figuratively, that which resembles such a pillar in appearance, character or office; a supporter or mainstay; as, the Pillars of Hercules; a pillar of the state.
• (a.) Having a support in the form of a pillar, instead of legs; as, a pillar drill.
• (n.) The center of the volta, ring or manege ground, around which a horse turns.