it means too add
Additional means in math form adding to an answer you can use a calculator or either your fingers long as you adding.
Other features; things that are added to the main thing. The word additional is similar to the word added.
additional means more
It means if you buy one item, the shipping charge might be, say, $6.95 But if you buy three items, they'll ship all three for the single charge of $6.95 They combine them (for shipping) at no extra...
The home in your dream represents your life. Additional rooms represent aspects of your life that you have not yet developed.