n. 1 a point at which two or more things are joined. 2 a place where two or more railway lines or roads meet, unite, or cross. 3 the act or an instance of joining. 4 Electronics a region of transition in a semiconductor between regions where conduction is mainly by electrons and regions where it is mainly by holes. junction box a box containing a junction of electric cables etc.
[ L junctio (as JOIN) ]