Meaning of “direct” - Learner’s Dictionary

direct

adjective us uk /dɪˈrekt, daɪˈrekt/
STRAIGHT

B1 going straight from one place to another without turning or stopping:

We went by the most direct route.

More examples

NOTHING BETWEEN

B2 with no other person or thing involved or between:

There is a direct link between smoking and cancer.
CLEAR

saying clearly and honestly what you think:

a direct answer
→ Opposite indirect

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