interannual

adjective in·ter·an·nu·al \ ˌin-tər-ˈan-yə(-wə)l , -yü-əl \
variants: or less commonly inter-annual

Definition of interannual

: occurring between, relating to, or involving two or more years : occurring or observed in different years
  • interannual changes in weather patterns

First Known Use of interannual

1881

in the meaning defined above

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