non-denominational

/N AA1 N D IH0 N AO0 M AH0 N EY0 SH AH0 N AH0 L/
adjective
  1. 1

    Lacking a denomination; not specific to a particular religion or sect.

    โ€œThere will be a nondenominational service, open to all, on Saturday beneath the redwoods.โ€

Source: https://en.wiktionary.org/wiki/non-denominational, https://en.wiktionary.org/wiki/nondenominational