Noun

(en noun)

A block or slab upon which a column, pedestal, statue or other structure is based.

*{{quote-book, year=1963, author=(Margery Allingham)

, title=(The China Governess) , chapter=Foreword citation , passage=He turned back to the scene before him and the enormous new block of council dwellings. The design was some way after Corbusier but the block was built up on plinths and resembled an Atlantic liner swimming diagonally across the site.}}

The bottom course of stones or bricks supporting a wall.

A base or pedestal beneath a cabinet.

Noun

(en noun)

A large single block of stone, used in architecture and sculpture.

*{{quote-magazine, date=2012-01

, author= , title=The Washington Monument , volume=100, issue=1, page=16 , magazine= citation , passage=The Washington Monument is often described as an obelisk, and sometimes even as a “true obelisk,” even though it is not. A true obelisk is a monolith , a pylon formed out of a single piece of stone.}}

Anything massive, uniform and unmovable.

(chemistry, chromatography) A continuous stationary-phase as a homogeneous column in a single piece.