Meaning to get along aimlessly (5)
I believe the answer is:
drift
'meaning' is the definition.
(drift is a kind of meaning)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for drift that I've seen before include "Go with the flow" , "Implication of what's been said" , "Large heap (of snow)" , "Float with current" , "Snow heaped up by wind" .)