(~s)
1.
Your ~ is an official document containing your name, photograph, and personal details, which you need to show when you enter or leave a country.
You should take your ~ with you when changing money.
...a South African businessman travelling on a British ~.
N-COUNT
2.
If you say that a thing is a ~ to success or happiness, you mean that this thing makes success or happiness possible.
Victory would give him a ~ to the riches he craves...
N-COUNT: N to n