Meaning of “vague” - Learner’s Dictionary

vague

adjective uk us /veɪɡ/
NOT CLEAR

not clear or certain:

I have a vague idea of where the hotel is.
He was a bit vague about directions.
NOT THINKING

showing that someone is not thinking clearly or does not understand:

a vague expression
vaguely adverb

I vaguely remember (= slightly remember) meeting her.
vagueness noun [ U ]

(Definition of “vague” from the Cambridge Learner’s Dictionary © Cambridge University Press)