Meaning of the word "be under no illusion" in English

What does "be under no illusion" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

be under no illusion

US /biːt əˈraʊnd ðə bʊʃ/
UK /biːt əˈraʊnd ðə bʊʃ/
"be under no illusion" picture

Idiom

1.

to understand the true facts of a situation and not have false ideas

Example:
You should be under no illusion about the difficulty of this task.
We are under no illusion that this will be easy.
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