Language scholars use the word monosemy for a word that has only one meaning. A word like "lucrative" (producing a profit) has only one meaning, and is therefore an example of monosemy. A word like "check" is a whole other story. When a word has just one meaning, it's completely clear and unambiguous.

What is the meaning of monosemy?

/ (ˈmɒnəʊˌsiːmɪ) / noun. the fact of having only a single meaning; absence of ambiguity in a wordCompare polysemy.

What is monosemy and polysemy?

As nouns the difference between polysemy and monosemy

is that polysemy is (semantics) the ability of words, signs and symbols to have multiple meanings while monosemy is (semantics) the property of terms of having a single meaning; absence of ambiguity.