Meaning of the word "no sooner said than done" in English

What does "no sooner said than done" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

no sooner said than done

US /noʊ ˈsuːnər sed ðæn dʌn/
UK /nəʊ ˈsuːnə sed ðæn dʌn/
"no sooner said than done" picture

Idiom

used to convey that a request or suggestion is being carried out immediately

Example:
I asked him to open the window, and no sooner said than done.
Could you bring me some water? No sooner said than done!