Meaning of “appearance” - Learner’s Dictionary

appearance

noun uk us /əˈpɪərəns/
IN PUBLIC [ C ]

B2 an occasion when someone appears in public:

a television/public appearance
He made two appearances during his brief visit.
WAY YOU LOOK [ no plural ]

B1 the way a person or thing looks:

She's very concerned with her appearance.
ARRIVAL [ no plural ]

an occasion when you arrive somewhere or can be seen somewhere:

Her appearance at the party was a surprise.
→ Opposite disappearance
BECOMING AVAILABLE [ no plural ]

B2 the time when something starts to exist or becomes available:

The appearance of new products on the market has increased competition.

(Definition of “appearance” from the Cambridge Learner’s Dictionary © Cambridge University Press)