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verb for·ti·fy \ˈfȯr-tə-ˌfī\

Simple Definition of fortify

  • : to strengthen (a place) by building military defenses (such as walls, trenches, etc.)

  • : to make (someone or something) stronger

  • : to make (yourself) feel stronger or less fearful

Source: Merriam-Webster's Learner's Dictionary

Full Definition of fortify



  1. transitive verb
  2. :  to make strong: as a :  to strengthen and secure (as a town) by forts or batteries b :  to give physical strength, courage, or endurance to <fortified by a hearty meal> c :  to add mental or moral strength to :  encourage <fortified by prayer> d :  to add material to for strengthening or enriching <fortified milk>

  3. intransitive verb
  4. :  to erect fortifications


play \-ˌfī(-ə)r\ noun

Examples of fortify in a sentence

  1. fortify a city against attack

  2. a city fortified by high walls

  3. Support for his theories has been fortified by the results of these experiments.

  4. He took a deep breath to fortify himself before stepping onto the stage.

  5. milk fortified with vitamin D

Origin and Etymology of fortify

Middle English fortifien, from Anglo-French fortifier, from Late Latin fortificare, from Latin fortis strong

First Known Use: 15th century

Rhymes with fortify

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FORTIFY Defined for Kids


verb for·ti·fy \ˈfȯr-tə-ˌfī\

Definition of fortify for Students



  1. 1 :  to make strong <Walls fortified the city against attack.> <Calcium fortifies bones.>

  2. 2 :  to add material to (something) to strengthen or improve it <The cereal was fortified with vitamins.>

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