Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adv. In an incontestable manner.

from The Century Dictionary and Cyclopedia

  • So as not to be contested or disputed; in a manner to preclude debate; indisputably; incontrovertibly; indubitably.

Etymologies

incontestable +‎ -ly (Wiktionary)

Examples

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