The problem with vague, obscure, or metaphorical definitions is that:

A) they are too wordy
B) they are too precise to allow for flexibility
C) they provide too much information
D) they require too much imagination
E) they are unclear

Metaphorical Definitions

Descriptions of concepts or terms that use metaphor to convey the intended meaning by referring to something that it does not literally denote, in order to suggest a similarity.

Vague

Vague describes something that is unclear, lacking in precise detail, or not explicitly expressed.

Obscure

Not clearly expressed or easily understood; vague or ambiguous.