Meaning of immatureness in English:

immatureness

Pronunciation /ˌɪməˈtjʊənəs/ /ˌɪməˈtʃʊənəs/ /ˌɪməˈtjɔːnəs/

noun

  • The quality or condition of being immature; immaturity.

Origin

Mid 17th century; earliest use found in Robert Boyle (1627–1691), natural philosopher. From immature + -ness.