Definition of "registration"

(countable, uncountable) The act of signing up or registering for something.  examples

(countable) That which registers or makes something official, e.g. the form or paper that registers.  examples

(uncountable) Alignment, e.g. of colors or other elements in a printing process.  examples

(uncountable) The location where guests register, especially with a hotel.  examples

(music) The art of selecting and combining the stops or registers of an organ.  examples