Like a temple with no columns

• Lacking a surrounding colonnade, as a temple
• Having no aisles, in architecture
• Wingless
• Having no aisles, as a church
• Not having a surrounding colonnade, in architecture
• Having no aisles

Wikipedia Word definitions in Wikipedia
Apteral (from the Greek απτερος, "wingless": α-, "without" + πτερον, "wing") is an architectural term applied to amphiprostyle temples which have no columns on the sides. In the temple Athena Nike known as "Nike Apteros", the adjective is used, not as applying ...

Wiktionary Word definitions in Wiktionary
a. 1 (context zoology English) apterous 2 (context architecture English) Without lateral columns; applied to buildings which have no series of columns along their sides, but are either prostyle or amphiprostyle.

WordNet Word definitions in WordNet
adj. having columns at one or both ends but not along the sides [ant: peripteral ] (of insects) without wings [syn: apterous ]

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Apteral \Ap"ter*al\, a. (Zo["o]l.) Apterous. (Arch.) Without lateral columns; -- applied to buildings which have no series of columns along their sides, but are either prostyle or amphiprostyle, and opposed to peripteral . --R. Cyc.