1 phrasal verb If you say that you can or will vouch for someone, you mean that you can guarantee their good behaviour. 2 phrasal verb If you say that you can vouch for something, you mean that you have evidence from your own personal experience that it is true or correct.

Can you vouch for him meaning?

: to say that (someone or something) is honest, true, or good I can vouch for the authenticity of the document. We'll vouch for him.

How can I vouch for someone?

to support the truth of something or the good character of someone, based on your knowledge or experience: Our accountant will vouch for the accuracy of the financial report. I've known him for years and can vouch for his honesty.