Definition of orthostat in English:

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Pronunciation: /ˈɔːθə(ʊ)stat/


An upright stone or slab forming part of a structure or set in the ground.
Example sentences
  • You could see immediately where the chambered areas were, because you could see the tops of the orthostats - the standing slabs that define the chambered areas.
  • The orthostats of the passage support roof slabs, but at the very front of the passage is a unique ‘roof-box’ which allows light to shine into the tomb through a slot above the roof of the outer passage.
  • Other features include three low cairns in the northern sector; three hollows in the interior; and, in the south-west quadrant, a slight bank 7.5 m. long immediately inside the ring of orthostats.


Early 20th century: from Greek orthostatēs, from orthos 'right or straight' + statos 'standing'.

For editors and proofreaders

Line breaks: ortho|stat

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