Definition of involutionary in US English:

involutionary

adjective

  • See involution

    • ‘That is, most of what they ascribed to involutionary givens were really evolutionary inheritances.’
    • ‘This stage of achievement marks the completion of the involutionary path of descent into matter and form.’
    • ‘A further approach is indicated by Theosophy, which has both involutionary and evolutionary stages or kingdoms.’
    • ‘When a man reverses the involutionary cycle in his own body he makes a start with the control of his sex energy.’
    • ‘Oppressed by such remarks at a time when xenophobia was not an asset, Alfano went through an involutionary process which culminated in the composition of another opera.’

Pronunciation

involutionary

/-ˌnerē/