week·ly 
(wēklē)
(wēklē)adv.
1. Once a week.
2. Every week.
3. By the week.
adj.
1. Of or relating to a week.
2. Occurring, appearing, or done once a week or every week.
3. Computed by the week: a weekly rate.
n. pl. week·lies
A publication issued once a week.