Forming an exception; not ordinary; uncommon; rare. / Better than the average; superior due to exception or rarity.

An exception, or something having an exceptional value

plural of exceptional

To be usual, not out of the ordinary; to follow an established pattern.

exceptional, having an exception

(archaic) Making exception.

One who makes an exception.

The act of excepting or excluding; exclusion; restriction by taking out something which would otherwise be included, as in a class, statement, rule.

plural of exception

with the exception of; but.