D defs.my
Entry 2 senses Webster, 1913

Closely

· Close·ly · IPA /ˈkləʊsliː/
01 adv. In a close manner.
  1. 1.
    In a close manner.
  2. 2.
    Secretly; privately.[Obs.]
    “That nought she did but wayle, and often steepe Her dainty couch with tears which closely she did weepe.” Spenser.