ALL meanings of sidereal month
si·de·re·al month
S s - noun sidereal month Also called calendar month. any of the twelve parts, as January or February, into which the calendar year is divided. 1
- noun sidereal month the time from any day of one calendar month to the corresponding day of the next. 1
- noun sidereal month a period of four weeks or 30 days. 1
- noun sidereal month Also called solar month. one-twelfth of a solar or tropical year. 1
- noun sidereal month Also called lunar month. the period of a complete revolution of the moon around the earth, as the period between successive new moons (synodic month) equal to 29.531 days, or the period between successive conjunctions with a star (sidereal month) equal to 27.322 days, or the period between successive perigees (anomalistic month) equal to 27.555 days, or the period between successive similar nodes (nodical month or draconic month) equal to 27.212 days. 1
- noun sidereal month an unusually long period of time of indefinite length: I haven't seen him for months. 1
- idioms sidereal month a month of Sundays. Sunday1 (def 4). 1
- noun sidereal month the time required for the moon to complete one revolution around the earth with respect to a fixed star: its average value is 27.32 days of mean solar time 0