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addition

1 ENTRIES FOUND:
addition ˈdɪʃən/ noun
plural additions
addition
ˈdɪʃən/
noun
plural additions
Britannica Dictionary definition of ADDITION
[noncount] : the act or process of joining something to something else : the act or process of adding something often + of
[noncount] mathematics : the act or process of adding numbers
[count] : something or someone more that is included : something or someone that is added
usually + to
[count] US : a part of a building that is built after the original part has been completed

in addition

: as something more used for adding information to a statement

in addition to

: along with or together with (something or someone)