From BiblePortal Wikipedia

Webster's Dictionary [1]

(1): ( adv.) Straightly; directly; in front.

(2): ( adv.) According to justice; according to the divine will or moral rectitude; uprightly; as, duty rightly performed.

(3): ( adv.) Properly; fitly; suitably; appropriately.

(4): ( adv.) According to truth or fact; correctly; not erroneously; exactly.

King James Dictionary [2]

Rightly, adv.

1. According to justice according to the divine will or moral rectitude as duty rightly performed. 2. Properly fitly suitably as a person rightly named. 3. According to truth or fact not erroneously. He has rightly conjectured. 4. Honestly uprightly. 5. Exactly.

Thou didst not rightly see.

6. Straightly directly. Not in use.