Of or occurring during the night; nocturnal: the cat's nightly prowl. (adjective)
Happening or done every night: the physician's nightly rounds. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "nightly" in a sentence
"Each team reports in nightly by phone and files a written weekly report."
"It was not enough for my merely taking in nightly news reports from CNN and other mainstream American media; to conduct an investigation for inquiry of social fact, I needed to go to Serbia and investigate for myself."
"Next door or across the street, there may be kids near your children's age, who participate in nightly pick-up soccer games in the street."