Based upon where you are from, different countries have different terms for "storm drain". abc

Depending on where Jonite trench grates are from, different countries have different terms for "storm drain".
Accordingly to Wikipedia, a storm drain is largely a tunnel that carry runoffs (rain) from urban areas. For a layman, it helps to think along the line of sewage system that functions beneath our cities.
In america, this is actually popularly known as "storm drain" or "storm sewer".
In great britan, this is actually typically referred to as "surface water drain" or "surface water sewer".
In Australia and New Zealand, it is popularly known as "stormwater drain".
And there it is, the next time you hear someone mentioning "storm drain", "storm sewer", "surface water drain","surface water sewer" and "stormwater drain", you now know they mention the same thing.
Functions of storm drain include draining excess water (rain or storm water) and ground water from pavement, streets and carparks into rivers and streams to counteract flooding.
Although storm drains accomplish a amazing job of draining excess water from the urban areas, the inlets are essentially openings where left uncovered can pose a hazard to pedestrians. Left uncovered, rubbish will get into the storm drains and cause choking which might eventually end up with flooding.
To ensure storm drains serve their purposes while minimizing the dangers posed to pedestrians and to prevent choking of the drains, drain covers (gratings) are used to cover the inlets (openings) of the storm drains to achieve the two purposes.
Over at Jonite, we focus on steel reinforced drain covers (gratings) for your storm drains while preserving the aesthetic areas of the architecture around the drain covers.