Anagram is a word OR phrase formed by the letters of the word OR phrase, generally using the letters exactly once.

For example: The word 'act', when we rearrange it, would be 'cat'. The 'cat' is another word based on the main word 'act'. The two words have the same letters and the same string length. Only we have changed the letter position and made a new word with the exact length.

We can say that an Anagram is rearranging the given word that makes another word.
'cork' => 'rock'
'gum' => 'mug'
'note' => 'tone'