Easton's Bible Dictionary
(1.) A day's journey in the East is from 16 to 20 miles (Numbers 11:31).
(2.) A Sabbath-day's journey is 2,000 paces or yards from the city walls (Acts 1:12). According to Jewish tradition, it was the distance one might travel without violating the law of Exodus 16:29. (see SABBATH.)
Noah Webster's New International Dictionary of the English Language
1. (n.) The travel or work of a day.
2. (n.) Travel or passage from one place to another; hence, figuratively, a passage through life.
3. (v. i.) To travel from place to place; to go from home to a distance.
4. (v. t.) To traverse; to travel over or through.