Seizure
A sudden electrical discharge in the brain causing changes in behavior, movement, or consciousness.
Seizures may be focal or generalized, and may or may not indicate epilepsy. Single seizures often don't, but recurrent unprovoked seizures define epilepsy.
What this means for you: seizures need workup (EEG, MRI). Don't fly long distances within 6 months of an unexplained seizure without medical clearance.
What a term means for you depends on your own reports. Ask your treating doctor, or send your reports for a free review.