reverie
: a state in which you are thinking about pleasant things
plural rev·er·ies
1
: daydream
2
: the condition of being lost in thought
http://www.merriam-webster.com/dictionary/reveries
In Beloved 69 paragraph 6.
“She and Baby Suggs had agreed without saying so that it was unspeakable; to Denver’s inquiries Sethe gave short replies or rambling incomplete reveries.”
Reveries here probably means being lost in her thoughts because there were not a lot of pleasant things that may have happened in her past because he and Baby Suggs have refused to talk about it. She is probably lost in her thought of the past and thinking about what to and not to share.
