Loss event

Any trigger for recovery under an insurance or reinsurance agreement. Examples include occurrence, claims made, death, or disability.
***
Term used in relation to the total claims payable by an insurer or reinsurer resulting from a single cause as an earthquake.
***
UK: the total losses to the ceding company or to the reinsurer resulting from a single cause such as a storm or flood, subject to any time limitations imposed by the reinsurer.
***
REINSURANCE: The total losses to the ceding company or to the reinsurer resulting from a single cause such as a windstorm.

Loss expectancy

An estimate of the most likely maximum loss that could be paid out on an exposure. Special attention is given to the loss prevention measures the insured takes.
***
An underwriter’s estimate of the probable maximum loss to be suffered on an exposure being considered, with attention given to the expected level of loss prevention activities on the part of the insured.
***
The underwriter’s calculation of probable maximum loss.

Loss Expense Reserve

Another name for claims reserve. The expression is also often used in association with the reserve deposited by a reinsurer with the cedant to cover in part outstanding claims (exact terms would indicate which party received the investment income on associated assets).