Calls: The buyer of a call has the right to buy the underlying stock at a set price until the option contract expires. (fidelity.com)
An agreement that gives you the right to buy a stock, bond, or other investment at a set price by a set date (within a set time period). (getsmarteraboutmoney.ca)
Futures provide protection to both parties by selling at a set price and in big batches. (kingofkash.com)