occasional occasional /ɔˈkeɪʒənəl/

adjective

1. () Occurring from time to time  ( occasional )
   occurring from time to time
    Took an occasional glass of wine
   took an occasional glass of wine
   
2. () Occurring or appearing at usually irregular intervals  ( episodic , episodical , occasional )
   occurring or appearing at usually irregular intervals
    Episodic in his affections
   episodic in his affections
    Occasional headaches
   occasional headaches
   
3. Recurring or reappearing from time to time  ( occasional , periodic )
   recurring or reappearing from time to time
    Periodic feelings of anxiety
   periodic feelings of anxiety
   
4. Occurring on a temporary or irregular basis  ( casual , occasional )
   occurring on a temporary or irregular basis
    Casual employment
   casual employment
    A casual correspondence with a former teacher
   a casual correspondence with a former teacher
    An occasional worker
   an occasional worker