the fact or process of losing something or someone:avoiding loss of time [count noun]:funding cuts will lead to job losses
an amount of money lost by a business or organization:insurance can protect you against financial loss [count noun]:we have incurred huge losses [in combination]:loss-making industries
the feeling of grief after losing someone or something of value:I feel a terrible sense of loss
[in singular] a person who or thing that is badly missed when lost:he will be a great loss to many people
at a loss
1puzzled or uncertain what to think, say, or do: [with infinitive]:she became popular, and was at a loss to know whyhe was at a loss for words
2making less money than is spent buying, operating, or producing something:a railway running at a loss