(economics) A cost that has already been incurred and which cannot be recovered to any significant degree.

Alternative spelling of sunny side up

(idiomatic) Everywhere; all over the place.

past participle of sing along

simple past tense and past participle of sunbake

Baked by the heat of the sun.

(rare) Alternative form of six ways to Sunday

Alternative form of sundowner syndrome

(medicine, psychology, psychiatry) A state of agitation, confusion, or delirium, especially in elderly patients suffering from Alzheimer's disease or other forms of dementia, which begins daily at nightfall and which is alleviated by daylight.

Alternative form of Sunday driver