cooling-off period
1. A period of time during a dispute wherein the parties involved do not communicate with one another as a means of reducing hostility and/or reconsidering their positions before taking further action. I think we both need a cooling-off period before one of us says something that we don't mean.
2. The time allowed after a purchase or the signing of a contract in which the buyer/signer may return the product or back out of the agreement without penalty or fee. I'm glad I had that cooling-off period after buying that sports car—there's no way I can actually afford it!
3. The period of time for which waste from nuclear fuel must be allowed to cool in water before being safely reprocessed or sent for permanent storage. If waste is not allowed its full cooling-off period, it could contaminate the environment and poison people.
grace period
1. A period of time after a debt has become due for payment during which no new fees, penalties, or interest are accrued. Our new student credit plan offers an additional 30-day grace period on all credit card purchases.
2. A period of time after an insurance premium has become due for payment during which the terms of the policy remain active and in effect. Luckily, I was still within the grace period for my home insurance policy when the basement got flooded, or else I don't know how I would have afforded the repairs!
3. By extension, any period of time following a deadline during which no penalty is issued. Due to his mother's sudden death, James was given a grace period of three weeks to submit his dissertation.
honeymoon period
The short amount of time at the beginning of a new relationship, activity, or pursuit when everything goes well and seems to be free of problems. Donna was excited when she started her new job, but once the honeymoon period was over, she realized that she had more responsibilities than she could handle. Many couples find it difficult to maintain a relationship after the honeymoon period ends.