(uberrima fides, or uberrimae fidei, of the utmost good faith) a duty laid on the parties to an insurance contract, especially the proposer, of greater force than ordinary good faith, requiring full disclosure of all facts which are or might be material to the contract; this duty subsists throughout negotiations over the terms of the contract and until the contract has been concluded, and may be maintained during the period of the contract if the policy so provides.