No, it's a metaphor.
it is neither, it is personification
Oh, dude, that's like asking if a hot dog is a sandwich or not. Technically, a walking dictionary would be a metaphor because it's comparing Jeffrey to a dictionary without using "like" or "as." But hey, if you wanna get super technical, you could argue it's a simile if you say Jeffrey is like a walking dictionary. But like, who really cares, right?
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
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.
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.