everyday

• every day (obsolete)
• every-day
• every day's

From Middle English everidayes, every daies, every dayes (“everyday, daily, continual, constant”, adjective, literally “every day's”), equivalent to every +‎ day.

• IPA^(key): /ˈɛvɹiˌdeɪ/

everyday (not comparable)

1. appropriate for ordinary use, rather than for special occasions
   • 1906, Edith Nesbit, The Railway Children, Chapter 4: The engine-burglar,

     When they had gone, Bobbie put on her everyday frock, and went down to the railway.

2. commonplace, ordinary
   • 2010, Malcolm Knox, The Monthly, April 2010, Issue 55, The Monthly Ptd Ltd, page 42:

     Although it is an everyday virus, there is something about influenza that inspires awe.

• mundane
• quotidian
• routine
• unremarkable
• workaday

everyday

1. Misspelling of every day. (compare everywhere, everyway, etc.).

When describing the frequency of an action denoted by a verb, it is considered correct to separate the individual words: every hour, every day, every week, etc.

Influenza is considered an everyday virus because it infects people every day.

everyday (uncountable)

1. (obsolete) Literally every day in succession, or every day but Sunday. [14th–19th c.]
2. (rare) the ordinary or routine day or occasion

   Putting away the tableware for everyday, a chore which is part of the everyday.

   • 2003, Robert Pack, Belief and Uncertainty in the Poetry of Robert Frost (Middlebury College press)‎, UPNE, →ISBN, →LCCN, →OCLC, page 110:

     Then you came in. I heard your rumbling voice
     Out in the kitchen , and I don't know why ,
     But I went near to see with my own eyes .
     You could sit there with the stains on your shoes
     Of the fresh earth from your own baby's grave
     And talk about your everyday concerns. […]

• James A. H. Murray [et al.], editors (1884–1928), “Everyday”, in A New English Dictionary on Historical Principles (Oxford English Dictionary), volume III (D–E), London: Clarendon Press, →OCLC, page 345, column 1.