If a system or organization is overburdened, it has too many people or things to deal with and so does not function properly. The city's hospitals are overburdened by casualties. an overburdened air traffic control system
heavily burdened with work or cares; "bowed down with troubles"; "found himself loaded down with responsibilities"; "overburdened social workers"; "weighed down with cares"
If you are overburdened with something such as work or problems, you have more of it than you can cope with. The Chief Inspector disliked being overburdened with insignificant detail. overburdened teachers