His earnings are 'directly proportional' to the number of units he sells.
The second game followed 'directly' [='immediately'] after the first.
Their house is 'directly' ahead. = It's 'directly' in front of us.
(..) turned hopefully or desperately... ...toward the freedom of the Americas. Lisbon became the great embarkation point. But not everybody could get to Lisbon directly. And so a torturous, roundabout refugee trail sprang up. Paris to Marseilles. Across the Mediterranean to Oran. (..)1942 Casablanca