renewable
adjective
uk/rɪˈnjuːəbl/ us/rɪˈnuːəbl/ NATURAL RESOURCES, ENVIRONMENT
relating to forms of energy that are produced using the sun, wind, etc., or from crops, rather than those using fuels such as oil or coal:
renewable electricity/fuel/power
renewable materials/resources
Sorghum is a brand new cash crop that can be burned as a fuel and is therefore a renewable source of energy.
LAW
if an agreement or an official document is renewable, its use can be continued for an extra period of time:
a renewable lease
The initial contract is for two years, renewable annually by mutual agreement.
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non-renewable adjective