Inserted in the calendar to make the calendar year correspond to the solar year. Used of a day or month.
Having such a day or month inserted. Used of a year.
Inserted between other elements or parts; interpolated.
intercalary in·ter·ca·lar·y (ĭn-tûr'kə-lěr'ē, ĭn'tər-kāl'ə-rē) adj. Occurring between two others, as an upstroke between two normal pulse beats in a pulse tracing.