the GNU version of the Collaborative International Dictionary of English
adj. Free from pain; without pain.
The Century Dictionary and Cyclopedia
Free from pain; not attended with pain: as, a painless surgical operation.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. not causing physical or psychological pain
adj. requiring little hard work or exertion
Word Usage
"It is also quite a handy trait to have because it makes starting up again quick and painless (well, mostly painlessĀ the volcano is a bit sensitive after it erupts)."