Definition of "fortified"

In 1969 output of table wines exceeded that of fortifieds for the first time, and by 1973 more than twice as much table wine as fortified was being produced.

2012, Barbara Santich, Bold Palates: Australia's Gastronomic Heritage, page 136

Every day he becomes stronger against evil, and more fortified against temptation.

1858, James Carter, Six Sermons, more or less bearing on the application of Christian principles to the circumstances of the present age, etc, page 37

Similarly, this material world, the universe, is covered by seven layers, and one layer, the first layer is there, and the second layer is ten times thicker than the first layer. the third layer is ten times thicker than the second layer. In this way, this universe is covered tightly, very fortified.

2019, Raj Behera, Pink Conch

The DMZ was and is very fortified, probably as fortified as any border in the world.

2014, Phillip C. Schaefer, Dartmouth Veterans: Vietnam Perspectives, page 63