Main definitions of rn in US English:

: Rn1RN2

Rn1

  • The chemical element radon.

Main definitions of rn in US English:

: Rn1RN2

RN2

abbreviation

  • 1(chiefly in North America) Registered Nurse.

  • 2

    (in the UK) Royal Navy

Pronunciation

RN

/ˌɑ ˈrɛn//ˌä ˈren/