The financial definition for Highly leveraged transaction (HLT):
Bank loan to a highly leveraged firm.
Cash transaction A transaction in which exchange is immediate in the form of cash, unlike a forward contract (which calls for future delivery of an asset at an agreed-upon price).
Closing transaction Applies to derivative products. Buy or sell transaction that eliminates an existing position (selling a long option or buying back a short option). Antithesis of opening transaction.