No, it's a metaphor.
it is neither, it is personification
Oh, what a lovely question! Let's paint a happy little picture here. Jeffrey could be like a walking dictionary if he knows a lot of words and their meanings, just like a dictionary does. Or he could be like a metaphor if he symbolizes something else beyond just being a walking dictionary. Either way, Jeffrey sounds like a fascinating person to know!
find a simile from the book shiver
A person who knows the dictionary by heart is often referred to as a lexicomane or a lexiconophilist.
A walking dictionary?
To say about someone that she is a walking dictionary, means that she knows the definitions of a remarkable number of words, so that if you were to ask her what a given word means, she would probably know.
A simile.
A metaphor
As quick as a wink is a simile. ----
It is a simile.
simile It is an example of a simile (uses like or as). A simile in itself though is a type of metaphor.
A walking dictionary refers to someone who has a vast vocabulary and knowledge of words, often able to provide definitions and explanations without the need for reference materials. This person is able to articulate their thoughts clearly and effectively, making them a valuable resource for others seeking linguistic guidance.