"Distance" is defined as how far apart two things are, usually with regard to physical space. The distance interval is sometimes measured in time, as in the sentence "The baby's arrival is still a distance of about 10 weeks from now."
In terms of space, distance traveled is the product of rate and time, the speed at which something travels times the amount of time it travels. When distance refers to the amount of linear space between two things, it is measured in units of length, such as inches, feet or miles. The word "distance" originates from the Latin term "distantia," meaning "a standing apart."