Bollard vs. Pillar — What's the Difference?

A bollard is a sturdy, short, vertical post. The term originally referred to a post on a ship or quay used principally for mooring boats, but is now also used to refer to posts installed to control road traffic and posts designed to prevent automotive vehicles from colliding or crashing into pedestrians and structures, whether intentional from ram-raids and vehicle-ramming attacks, or unintentional losses of control.

A slender, freestanding, vertical support; a column.

(Nautical) A thick post on a ship or wharf, used for securing ropes and hawsers.

Such a structure or one similar to it used for decoration.

One of a series of posts preventing vehicles from entering an area.

One who occupies a central or responsible position

A projecting bulge of snow or ice used as an anchor for a rope in mountaineering.

To support or decorate with pillars or a pillar.

(nautical) A strong vertical post of timber or iron, fixed to the ground and/or on the deck of a ship, to which the ship's mooring lines etc are secured.

(architecture) A large post, often used as supporting architecture.

A similar post preventing vehicle access to a pedestrian area, to delineate traffic lanes, or used for security purposes.

Something resembling such a structure.

An upright wooden or iron post in a boat or on a dock, used in veering or fastening ropes.

(figuratively) An essential part of something that provides support.

A strong post (as on a wharf or quay or ship for attaching mooring lines);

(Roman Catholic) A portable ornamental column, formerly carried before a cardinal, as emblematic of his support to the church.

The centre of the volta, ring, or manege ground, around which a horse turns.

(bodybuilding) The body from the hips over the core to the shoulders.

To provide with pillars or added strength as if from pillars.

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.

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 portable ornamental column, formerly carried before a cardinal, as emblematic of his support to the church.

The center of the volta, ring, or manege ground, around which a horse turns.

Having a support in the form of a pillar, instead of legs; as, a pillar drill.

A fundamental principle or practice;

Anything tall and thin approximating the shape of a column or tower;

A prominent supporter;

A vertical structure standing alone and not supporting anything (as a monument or a column of air)

(architeture) a tall cylindrical vertical upright and used to support a structure