The phrase "usable condition" means something is in a state where it can be effectively used or operated.
Sentences with «usable condition»
At the end of the year, I suspect we're better at getting every textbook returned in usable condition, since we're small enough to keep an eye on those things. (educationnext.org)
And when it freezes, it takes more than one restart to get it back into usable condition. (blog.the-ebook-reader.com)
The idea is that the insurance company has a right to expect the vehicle to be kept in usable condition rather than allowed to deteriorate. (usinsuranceagents.com)