Definitions
1.NounA graphical representation of a chronological sequence of events (past or future).
2.NounThe feed of a social media service, especially when ordered chronologically.
3.NounA schedule of activities; a timetable.
4.NounAn individual universe or reality, especially a parallel/alternate one in which events differ from actual history, or differ from the established canon of a fictional world."on an alternate timeline; worst timeline"
5.VerbTo analyse a sequence of events or activities.
6.VerbTo display such a sequence graphically.