To spend Sunday (at a certain place, with a certain person or people, etc.).
A comic strip published in a Sunday newspaper.
The first day of the week in many religious traditions, and the seventh day of the week in systems using the ISO 8601 standard; the Christian Sabbath; the Lord's Day; it follows Saturday and precedes Monday.
A newspaper published on Sunday.
On Sundays.
Untidy in appearance.
Scurfy.
An artificial intelligence researcher who believes that intelligence is too complicated (or computationally intractable) to be solved with the sorts of homogeneous system favoured by the "neats".