off keel prepositional phrase2 •Out of balance, tilting to one side. (of a watercraft, etc.)The tide was full and the dingey was off keel. The punt nosed the pebbly slope like a terrier, but her stern swung clear. — 1896 •(figurative) Out of control, not proceeding or running smoothly.The lower half of a duplex apartment on a shabby Montreal street, dark as limbo, jerry-built fifty years ago and going off keel ever since. — 1960