brief episode in which the brain gets insufficient blood supply; symptoms depend on the site of the blockage
"After waking up from a severe headache, the doctor confirmed that my morning dizziness was just a transient ischemic attack."
Initialism of transient ischemic attack.
"The doctor noted that his recent neurological symptoms were likely caused by a TIA before he advised him to monitor his blood pressure."
Initialism of Telecommunications Industry Association.
"Tia arrived at the door holding a bag of fresh bread for our family gathering."
A female given name
Initialism of thanks in advance.
"Please send me the report by Friday, tia."