"look up dictionary" or "consult a dictionary"

[Cicily21]

Dear All,

Which one is correct and why?

If there's any words you do not understand, ________ dictionary.

(a) look up
(b) consult a


Thanks a lot for your kind assistance.

All the Best and Happy Chinese New Year,
Cicily

[Tdol]

Dear All,

Which one is correct and why?

If there's any words you do not understand, ________ dictionary.

(a) look up
(b) consult a


Thanks a lot for your kind assistance.

All the Best and Happy Chinese New Year,
Cicily

It should be 'consult a' because you'd have to say 'look them up in a dictionary'. Though many speakers would say "there's", I'd recommend using 'there are'. Happy new year.