- Not very often.
"He took an occasional glass of wine."
- Acting in the indicated role from time to time.
"He is an occasional contributor to letters to the editor."
- Occurring or appearing irregularly from time to time.
"He was mostly solitary, but enjoyed the occasional visitor."
- Intended for use as the occasion requires.
"What your living room needs are some occasional chairs."
- Created for a specific occasion.
"Elgar's music was not created to be occasional music for high-school graduations."