unzipped

English

Etymology 1

From unzip +‎ -ed.

Verb

unzipped

1. simple past and past participle of unzip

Etymology 2

From un- +‎ zip +‎ -ed.

Adjective

unzipped (not comparable)

1. Not zipped (closed with a zip fastener).
   • 2004 April 6, Lisa Tucker, Shout Down the Moon, Pocket Books, →ISBN, page 63:

     She threw the unzipped backpack outside, and when I ran out to get it, because I was worried about my homework blowing away, she locked and bolted the door.

   • 2008 June 17, Elizabeth Hartley Winthrop, December, Knopf Doubleday Publishing Group, →ISBN, page 226:

     She sees the books from her backpack scattered around her, and suddenly she is in her father’s old bedroom again, putting her books into her backpack when her mother comes to tell her that the cousins have arrived, slinging her backpack on before it is zipped and following her downstairs, and her backpack is unzipped in the hall as they eat Yorkshire pudding and roast beef, and it is unzipped in the hall as they eat Yorkshire pudding and roast beef, and it is unzipped in the car as they drive home, and it is unzipped as she runs through the lobby and crashes to the tiles, but it is only now, as the blood from her nose seeps into the cuff of her sweater and the books lie all around her, that she realizes that it has been unzipped all this time.

   • 2013 December 4, Jasmine Jean-Pierre, It’s Raining Uber, Archway Publishing, →ISBN, page 75:

     Cloudy crawls inside the unzipped backpack.

2. Not zipped (compressed into a single and often smaller file, especially a zip file).
   • 2003, Deborah S. Ray, Eric J. Ray, “Chapter 13: Working with Encoded & Compressed Files”, in UNIX: Teach yourself Unix the quick and easy way! This Visual QuickStart Guide uses pictures rather than lengthy explanations. You’ll be up and running in no time!, Peachpit Press, →ISBN, Zipping a File or Directory with gzip, page 288:

     To zip a file or directory with gzip: / […] / 2. gzip zipadeedoodah.tar / Type gzip followed by the name of the file or directory to gzip. The zipped file will replace the unzipped version and will have a new .gz extension. / ✓ Tips / […] / ▪ If you want to keep a copy of the original, unzipped file, try gzip -c filetogzip > compressed.gz.

   • 2013 October 29, Max Marchi, Jim Albert, Analyzing Baseball Data with R, CRC Press, →ISBN, page 303:

     The function unzip.retrosheet unzips the file and puts the individual event files and roster files in the “unzipped” folder. The function create.csv.file(season) reads the individual team record files into R, merges the files, and writes a new single combined file in csv format in the “unzipped” folder.

   • 2016, John R. Suler, Psychology of the Digital Age: Humans Become Electric, Cambridge University Press, →ISBN, page 132:

     hawkeye: as one of my friends like to say, “How hard is your big drive?” / daisy: lol! / dragon: more importantly, Hawkeye, is it compressed? / daisy: more importantly, is it unzipped? / hawkeye: and how often do you optimize it?

Etymology 3

From un- +‎ zipped.

Adjective

unzipped (not comparable)

1. (of mail) Lacking a zip code.

   Antonym: zipped

   • 1969 November, Arthur Fisher, “Science Newsfront: Last-minute news and notes to keep you up-to-date”, in Popular Science, volume 195, number 5, page 22:

     New computer-driven postal machinery will speed up the processing of mail that is properly addressed with zip code, but may possibly delay mail that lacks the zip code. […] But woe betide a letter that lacks the zip code! For unzipped mail, the clerk punches a button that shunts the letter aside for later processing by hand.