Not having tracks or paths; untrodden. / Not following a track. / (of a train etc.) Not running on tracks. / (of a closed railway) Without any track, after the track has been removed.

(computing) software that converts an IP address into a hostname and provides location and other information

A navigational device which measures the angular separation of stars with reference to a known time and place in order to achieve precise navigation.

plural of tracker

plural of IP tracker

(computing) A pointing device consisting of a ball housed in a socket

plural of trackball

(music) A list of tracks appearing on an album, EP, LP etc.

plural of tracklisting

(uncountable, computing) A method to keep track of links to content, especially blog entries. / (countable, Internet) A snippet of text joined to an entry from another website linking to it.