noun

• The act of recognizing or the condition of being recognized (matching a current observation with a memory of a prior observation of the same entity).
• Acceptance as valid or true.
• Official acceptance of the status of a new government by that of another country.
• Honour, favourable note, or attention.
• (immunology) The propriety consisting for antibodies to bind to some specific antigens and not to others.
• (Scotland, law, historical) A return of the feu to the superior.