an upright column of stone etc as a support or ornament
column of building, or freestanding column
Cases of word usage
1) a tall, upright block of stone (as a pillar or monument) (monolith)
2) a tall, pointed, four-sided stone pillar (obelisk)
3) a structure of wood, iron etc built out into the sea as a landing-stage or for walking on for pleasure; a pillar supporting a bridge etc (pier)
4) a square base or block on which a pillar or statue stands (plinth)
