To understand something is to comprehend or get it. The more we learn, the more we understand.

The goal of most education is to help students understand how the world works: history, math, English, music, science, and art are all complicated subjects that you need to practice and think about before you can really understand them. Understanding requires knowledge and thought. Another kind of understanding is like sympathy. For example, you might not approve of stealing, but you could understand why a guy would steal to feed his family.

Definitions of understand
  1. verb
    know and comprehend the nature or meaning of
    “She did not understand her husband”
    “I understand what she means”
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    apprehend, compass, comprehend, dig, get the picture, grasp, grok, savvy
    understand or perceive the meaning of something
    grasp the meaning
    catch, get
    grasp with the mind or develop an understanding of
    interpret, read, translate
    make sense of a language
    to hear and understand
    construe, interpret, see
    make sense of; assign a meaning to
    make out
    figure out, lick, puzzle out, solve, work, work out
    find the solution to (a problem or question) or understand the meaning of
    bottom, fathom, penetrate
    come to understand
    catch on, cotton on, get it, get onto, get wise, latch on, tumble, twig
    understand, usually after some initial difficulty
    know or grasp by intuition or feeling
    digest, process
    arrange and integrate in the mind
    be amiss, misapprehend, misconceive, misconstrue, misinterpret, misunderstand
    interpret in the wrong way
    read between the lines
    understand what is implied but not expressed on the surface
    mythicise, mythicize
    interpret as a myth or in terms of mythology
    literalise, literalize
    make literal
    spiritualise, spiritualize
    give a spiritual meaning to; read in a spiritual sense
    assign a new or different meaning to
    allegorise, allegorize
    interpret as an allegory
    read, take
    interpret something in a certain way; convey a particular meaning or impression
    interpret something that is written or printed
    read, scan
    obtain data from magnetic tapes
    answer, resolve
    understand the meaning of
    explain a riddle
    arrive at after reckoning, deliberating, and weighing
    guess, infer
    guess correctly; solve by guessing
    give the correct answer or solution to
    find the solution or key to
    draw out, educe, elicit, evoke, extract
    deduce (a principle) or construe (a meaning)
  2. verb
    perceive (an idea or situation) mentally
    “I don't understand the idea”
    synonyms: realise, realize, see
    envision, fancy, figure, image, picture, project, see, visualise, visualize
    imagine; conceive of; see in one's mind
    see and understand, have a good eye
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    become conscious of
    appreciate, take account
    be fully aware of; realize fully
    sense, smell, smell out
    become aware of not through the senses but instinctively
  3. verb
    be understanding of
    “You don't need to explain--I understand!”
    synonyms: empathise, empathize, sympathise, sympathize
  4. verb
    make sense of a language
    “She understands French”
    synonyms: interpret, read, translate
  5. verb
    believe to be the case
    “I understand you have no previous experience?”
    synonyms: infer
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    type of:
    accept as true; take to be true
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