Definition of presumer in US English:

presumer

noun

  • 1A presumptuous person. Now rare.

  • 2A person who assumes or takes something for granted, without proof or good evidence.

Origin

Early 16th century; earliest use found in John Fisher (c1469–1535), bishop of Rochester, cardinal, and martyr. From presume + -er.

Pronunciation

presumer

/prɪˈzjuːmə/