Metaphor
it is neither, it is personification
Yes, "walking dictionary" is an example of a simile. This phrase is comparing someone's vast knowledge or ability to recall information to that of a dictionary, emphasizing their expertise in a particular subject.
simile its a simile when you use "like"
A metaphor
A metaphor, a simile uses the words like or as.
that man
simile
Metaphor...similes use like or as
simile
"He was a lion in the fight" is a metaphor.
simile
simile and METAPHOR AND PERSONIFICATION AND CHEESE