Definition of improvability in US English:

improvability

noun

  • See improve

    • ‘Successful health services in the 21st century must aim not merely for change, improvement, and response, but for changeability, improvability, and responsiveness.’
    • ‘Almost all of Jonathan Demme's major films, from Citizens Band to Beloved, express a belief in the unpredictability and improvability of human nature.’

Pronunciation

improvability

/imˌpro͞ovəˈbilədē//ɪmˌpruvəˈbɪlədi/