Real Dictionary

kind adjective uses
You can use kind in expressions such as please be so kind as to and would you be kind enough to in order to ask someone to do something in a firm but polite way.
adjective: Someone who is kind behaves in a gentle, caring, and helpful way towards other people.

kind in American English
origin
sympathetic, friendly, gentle, tenderhearted, generous, etc.

kind in American English 1
adjective: of a good or benevolent nature or disposition, as a person

kind in American English 2
noun: a class or group of individual objects, people, animals, etc., of the same nature or character, or classified together because they have traits in common; category

kind in British English 1
adjective: having a friendly or generous nature or attitude

kind in British English 2
noun: a class or group having characteristics in common; sort; type

kind noun uses and phrases
countable noun: If you talk about a particular kind of thing, you are talking about one of the types or sorts of that thing.