v.
1.make reference to
2.have to do with or be relevant to
3.think of, regard, or classify under a subsuming principle or with a general group or in relation to another
4.send or direct for treatment, information, or a decision
5.seek information from
6.have as a meaning
Idiom of the Day
in a world of one's own
in deep thought or concentration, not caring about other people
The boy is in a world of his own and he does not notice what other people say or think.