Noun

• S: (n) calendar (a system of timekeeping that defines the beginning and length and divisions of the year)
• S: (n) calendar (a list or register of events (appointments or social events or court cases etc)) "I have you on my calendar for next Monday"
• S: (n) calendar (a tabular array of the days (usually for one year))

Verb

• S: (v) calendar (enter into a calendar)
• direct hypernym / inherited hypernym / sister term
• derivationally related form
• sentence frame