In Antis Definition

ăntĭs

adjective

Having a recessed portico with a row of columns between the antae, as in some Greek temples.

American Heritage

Of or being the portico or columns in such an arrangement.

American Heritage

adverb

(architecture) Between antae; said of a portico in classical style, where columns are set between two antae, forming the angles of the building.

Wiktionary

Part or all of this entry has been imported from the 1913 edition of Webster's Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.

Wiktionary

Origin of In Antis

From Latin in antīs among the pilasters in in antīs ablative of antae pilasters, antae

From American Heritage Dictionary of the English Language, 5th Edition
Latin

From Wiktionary