on offer—
1. presented for sale:
- The few non-pedigree cattle on offer were of moderate class.
2. (of ideas, etc.) proposed; suggested:
- “How nice!” said Noni, with what passed with her for wit. “Any more great thoughts on offer?”
under offer—(of property) provisionally sold prior to the signing of a contract:
- Three of the farms were sold last year and a fourth is also under offer.