I can clarify the usage of the word a bit if it helps.
pre-ictal means the time before a seizure. This is also before the aura if you have that. This may present with changes on an EEG that show 'risk behaviour' and some people might start feeling just a little confused here. This period can be very short.
ictal means during the seizure. This is self explanatory
post-ictal means the time after a seizure, usually also a time of recovery. EEG wise, this usually is a time of generalized or localized slowing of brain waves and disrupted normal waves and 'chatter'.
inter-ictal means the time where someone isn't having seizures. During this time there may be certain clues as to if someone has epilepsy or not. this is usually where people get EEG's done and sometimes have small spikes, but some/many people may not have any activity here.
Cheers,
Anna