What does "to realize" mean?

[Rich7]

could help me understand realization in this context?

In varieties of African-American English, the interdental fricatives are [realized [as either alveolar stops or labiodental fricatives, depending upon the location of the fricative in the word.

When located at the beginning of a word, the interdental fricative is realized as . For example, the word thin is pronounced as . When located word-medially or word-finally, the interdental fricative is realized as . For example, the word bath is pronounced as .

Note: after every "as" there should be a sign (phonetical one) that is not a character in the keybord (by the way how can it be posted)
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I should have been born in the USA.
I've got this thing about America.

[Torsten]

the interdental fricative is realized = the interdental fricative is spoken/pronounced as '....'.
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Test Of English for International Communication
TOEIC Preparation & TOEIC Vocabulary

[Rich7]

And some time later.....

Thanks mr T.......
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I should have been born in the USA.
I've got this thing about America.