Atheist 'church'?

[Angrboda]

Oxford English dictionary:

noun
a building used for public Christian worship:

Highlighted the words Christian and worship.

The Oxford English Dictionary also gives the following as a definition of the word church:

2. Applied to public places of worship of any religion: as †a. (formerly) to heathen temples, Muslim mosques.
†b. also to the Jewish temple. Obs.
c. In U.S., of late applied to places of meeting and religious exercise of various societies called ‘churches’.

~ OED on CD-ROM

Are you trying to pull a fast one on us? In addition to that, the notes on etymology in the OED make clear that the derivation of the word through its Germanic cognates may not refer to a Christian place of worship, as the related cognates in the New Testament refer to the body of worshippers, not the physical place of worship. I suspect you got your definition from the online edition of the Oxford Dictionary, which is unrelated to the Oxford English Dictionary and is an inferior reference work to the OED. Regardless, you are engaging in a genetic fallacy in presuming that the way a word has been used historically determines how it is used today. If there are non-Christian communities that use the word 'church' to refer to the place they gather, then usage, not history, dictates that the definition now includes places where non-Christians congregate in imitation of the religious institution. To say otherwise is both bad scholarship (appealing to one documented usage while ignoring another equally valid usage) and fallacious reasoning (arguing that a historical condition that no longer holds dictates current conditions).