special

unique or specific to a person or thing or category

• “the particular demands of the job”
• “has a paraticular preference for Chinese art”
• “a peculiar bond of sympathy between them”
• “an expression peculiar to Canadians”
• “rights peculiar to the rich”

for a special service or occasion

• “a special correspondent”
• “a special adviser to the committee”
• “had to get special permission for the event”

surpassing what is common or usual or expected

• “he paid especial attention to her”
• “exceptional kindness”
• “a matter of particular and unusual importance”
• “a special occasion”
• “a special reason to confide in her”
• “what”

adapted to or reserved for a particular purpose

• “a special kind of paint”
• “a special medication for arthritis”

having a specific function or scope

• “a special (or specific) role in the mission”

first and most important

• “his special interest is music”
• “she gets special (or particular) satisfaction from her volunteer work”

added to a regular schedule

• “a special holiday flight”
• “put on special buses for the big game”

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”