noun

• The act of appearing or coming into sight; the act of becoming visible to the eye.
• A thing seen; a phenomenon; an apparition.
• The way something looks; personal presence
• Apparent likeness; the way which something or someone appears to others.
• (philosophy, theology) That which is not substance, essence, hypostasis; the outward reality as opposed to the underlying reality
• The act of appearing in a particular place, or in society, a company, or any proceedings; a coming before the public in a particular character.
• (law) An instance of someone coming into a court of law to be part of a trial, either in person or represented by an attorney or such like; a court appearance
• (medicine) Chiefly used by nurses: the act of defecation by a patient.