1 the way that someone or something looks : I like the appearance of stripped antique pine | they are similar in appearance.• an impression given by someone or something, although this may be misleading : she read it with every appearance of interest.
2 an act of performing or participating in a public event : he is well-known for his television appearances.
3 [usu. in sing. ] an act of becoming visible or noticeable; an arrival :the sudden appearance of her daughter startled her.• a process of coming into existence or use : the appearance of the railroad.PHRASESkeep up appearances maintain an impression of wealth or well-being, typically to hide the true situation.make (or put in) an appearance attend an event briefly, typically out of courtesy.to (or by) all appearances as far as can be seen : to all appearances, it had been a normal day.