|Origin:||fortifier, from Latin fortis 'strong'|
for‧ti‧fy past tense and past participle fortified, present participle fortifying, third person singular fortifies [transitive]
to build towers, walls etc around an area or city in order to defend it:
The town was heavily fortified.
to encourage an attitude or feeling and make it stronger [= strengthen]:
Her position was fortified by election successes and economic recovery.
to make someone feel physically or mentally stronger
fortify yourself (with something)
We fortified ourselves with a breakfast of bacon and eggs.
4 [usually passive]DF
to make food or drinks more healthy by adding vitamins to them:
fortified breakfast cereals
fortify something with something
foods fortified with vitamin B