| Noun | 1. | locus - the scene of any event or action (especially the place of a meeting)scene - the place where some action occurs; "the police returned to the scene of the crime" |
| 2. | locus - the specific site of a particular gene on its chromosome | |
| 3. | locus - the set of all points or lines that satisfy or are determined by specific conditions; "the locus of points equidistant from a given point is a circle" set - (mathematics) an abstract collection of numbers or symbols; "the set of prime numbers is infinite" |