(fortifies, ~ing, fortified)
1.
To ~ a place means to make it stronger and more difficult to attack, often by building a wall or ditch round it.
...British soldiers working to ~ an airbase in Bahrain.
VERB: V n
2.
If food or drink is fortified, another substance is added to it to make it healthier or stronger.
It has also been fortified with vitamin C...
...fortified cereal products.
VERB: usu passive, be V-ed with n, V-ed