Correct spelling, explanation: this is the correct spelling as the word comes from an adjective visible with noun suffix, therefore the word is visibility. There is no a in the root word that would make it visability, so that is a mistake. Visibility is the correct spelling.
Definition of visibility:
noun, a description of how clearly you can see something
Weather conditions and visibility are very important when it comes to driving.
We went hiking but it was nothing special – it was raining and the visibility was terrible.
Incorrect spelling, explanation: visability is incorrect because visibility (the correct form) comes from visible, also spelled with two i’s and no a’s. With a noun suffix, it made the word visibility and any other spelling incorrect.
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What about this phrase in Non-American variant of English spelling?
Your English guide is… How do I say it? Just what I needed! Finally I’ve found something that helped me. Appreciate it!