What is the meaning of Loading?

The process by which something is loaded.

A load, especially in the engineering and electrical engineering senses of force exerted, or electrical current or power supplied.

An hourly pay rate given to a casual employee which is higher than the equivalent full-time or part-time employee's rate, usually paid to compensate for a lack of benefits such as sick leave or annual leave.

A weighting or bias.

present participle and gerund of load

Source: wiktionary.org