special

surpassing what is common or usual or expected“he paid especial attention to her”

unique or specific to a person or thing or category“the particular demands of the job”

adapted to or reserved for a particular purpose“a special kind of paint”

having a specific function or scope“a special (or specific) role in the mission”

first and most important“his special interest is music”

added to a regular schedule“a special holiday flight”

for a special service or occasion“a special correspondent”

a special offering (usually temporary and at a reduced price) that is featured in advertising“they are having a special on pork chops”

a dish or meal given prominence in e.g. a restaurant

a television production that features a particular person or work or topic“the last of a series of BBC specials on Iran is being shown tonight”