oc ‧ ca ‧ sion ‧ al S3 W3 /əˈkeɪʒ ə nəl/ BrE AmE adjective [only before noun]
[ Word Family: noun : ↑ occasion ; adverb : ↑ occasionally ; adjective : ↑ occasional ]
happening sometimes but not often or regularly:
He made occasional visits to London.
They had an occasional coffee together after shopping.
He only has occasional use of a car.
We should have enough money left for the occasional trip.