- Inserted or introduced among others in the calendar;
as, an intercalary month, day, etc.; -- now applied particularly to the
odd day (Feb. 29) inserted in the calendar of leap year. See
Bissextile, n.
2 . Intercalary
[ n.]
- Introduced or inserted among others; additional;
supernumerary.
Meaning of 'intercalary' (Princeton's WordNet)
1 . intercalary
[ s]
Meaning (1): - having a day or month inserted to make the calendar year correspond to the solar year: