Definitions from Wiktionary (fortify)

▸ verb:  (transitive)
▸ verb:  To give power, strength, or vigour to (oneself or someone, or to something); to strengthen.
▸ verb:  To support (one's or someone's opinion, statement, etc.) by producing evidence, etc.; to confirm, to corroborate.
▸ verb:  To increase the nutritional value of (food) by adding ingredients, especially minerals or vitamins.
▸ verb:  (figurative)
▸ verb:  To impart fortitude or moral strength to (someone or their determination, or something); to encourage.
▸ verb:  To make (something) defensible against attack by hostile forces.
▸ verb:  (archaic) To make (something) structurally strong; to strengthen.
▸ verb:  (military)
▸ verb:  To increase the defences of (an army, soldiers, etc.), or put (it or them) in a defensive position.
▸ verb:  To secure and strengthen (a place, its walls, etc.) by installing fortifications or other military works.
▸ verb:  (obsolete) To provide (a city, a fortress, an army, etc.) with equipment or soldiers.
▸ verb:  (winemaking) To add spirits to (wine) to increase the alcohol content.
▸ verb:  (intransitive)
▸ verb:  (military) To install fortifications or other military works; also (sometimes figurative), to put up a defensive position.
▸ verb:  (obsolete) To become strong; to strengthen.

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