n. the time spent at a workplace doing non-work activities.
The Century Dictionary and Cyclopedia
n. The part or division of the day which included undern: generally applied to the after-part of the day. See undern.
Word Usage
"When I returned to the time when I had picked up the pistol, all I could see from the undertime was a shimmering flow of energy and a sea of hot glass fused into strange shapes and emitting a hellish glare quite discernible from the undertime."