Definition of ephemeris

• n. - A diary; a journal.
• n. - A publication giving the computed places of the heavenly bodies for each day of the year, with other numerical data, for the use of the astronomer and navigator; an astronomical almanac; as, the "American Ephemeris and Nautical Almanac."
• n. - Any tabular statement of the assigned places of a heavenly body, as a planet or comet, on several successive days.
• n. - A collective name for reviews, magazines, and all kinds of periodical literature.