non-biodegrad·ableBrE /ˌnɒn ˌbaɪəʊdɪˈɡreɪdəbl/ 🔊NAmE /ˌnɑːn ˌbaɪoʊdɪˈɡreɪdəbl/ 🔊 adjectivea substance or chemical that is non-biodegradable cannot be changed to a harmless natural state by the action of bacteria, and may therefore damage the environment （物质或化学品）不可生物降解的，非生物降解的 OPP biodegradable