Of or relating to a week. / Happening once a week, or every week.

A publication that is published once a week.

Occurring twice a week; occurring once every one-half a week

Twice a week.

A periodical published twice a week.

Alternative form of biweekly

Alternative form of biweekly

The evening of a weekday.

(euphemistic) A condom.

A part-time soldier, or reservist / (idiomatic) A person who indulges in a sport or pastime on an infrequent basis, usually on weekends when work commitments are not present.