This word is acceptable for play in the UK dictionary that is being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. Words or phrases that have a single meaning; absence of ambiguity.

n. having a single meaning (absence of ambiguity) usually of individual words or phrases

"But science itself sets an objective standard that ensures universal monosemy."

polysemy   

clearness    lucidity    pellucidity    clarity    lucidness   

monosemic