1: The accidental use of "text language" when writing manually, or composing a formal e-mail
2: the inability to spell words correctly when first learning to use T9 predictive text or other predictive texting modes.
Definition One:

Doctor to patient:
Dear patient,
Just a friendly remindr. Please be sure 2 take 50mg of the medication I prescribed to you w/ plenty of water.
Sincerely, Doc

Definition Two:

Sender: "Hi, how's evrythg going?"
Reciever: "What's 'evrythg' mean?"
Sender: "Sorry, I have a mild case of textlexia."
by Lee Brody March 7, 2009
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A person who has severe trouble remembering other people's names and is a terrible speller when texting. Similar to Dyslexia.
John:(texting) "hey whats up?"
Larry:(also texting) "nb Mike. hgt?
John: "you must have textlexia."
by laxislife19 April 16, 2009
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An inability to compose an interpretable text message due to outside pressures or emotional constraints.
by sparksneon January 7, 2007
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