regards
n. uncountable B1 Intermediate US //ɹɪˈɡɑɹdz// UK //ɹɪɡˈɑːdz// re·gards
n. friendly greetings or good wishes that you send to someone. You often use this at the end of an email or letter to be polite.
n. best wishes or greetings, typically conveyed through a third party or used as a closing formula in correspondence. Plural in form when used in this sense.
Please give my best regards to your parents.
She ended the professional email with 'Kind regards' before typing her full name and title.
The ambassador sent his warmest regards to the committee, expressing regret that he could not attend the opening ceremony in person.
Usage
Almost exclusively used in the plural form when expressing greetings or closing a letter.
Pitfall
Best regard,Best regards,When used as a closing in a letter or to mean greetings, the word must be plural.