Definition of unsprung in English:

unsprung

Pronunciation /ˌənˈsprəNG/ /ˌənˈsprəŋ/

adjective

  • Not provided with springs.

    ‘A mattress on an unsprung base (including fixed-slat bases) should last about 10 years.’
    • ‘He sat upon the unsprung bed and looked across the cell.’
    • ‘Try an alternative bed-base and unsprung mattress, preferably with natural materials.’