The source of, or reason for, an event or action; that which produces or effects a result.
Sufficient reason for a state, as of emotion.
A goal, aim or principle, especially one which transcends purely selfish ends.
A suit or action in court; any legal process by which a party endeavors to obtain his claim, or what he regards as his right; case; ground of action.
To actively produce as a result, by means of force or authority.
To set off an event or action.
The person, place, or thing from which something (information, goods, etc.) comes or is acquired.
A reporter's informant.
Source code.
The name of one terminal of a field effect transistor (FET).
Spring; fountainhead; wellhead; any collection of water on or under the surface of the ground in which a stream originates.
To obtain or procure: used especially of a business resource.
To find information about (a quotation)'s source (from which it comes): to find a citation for.