1.The term "casualisation of the workforce" refers to the process of shifting from permanent, secure employment to temporary, low-wage, and often precarious work arrangements. 

2.This can include part-time work, temporary employment, seasonal work, or jobs with irregular hours, without the benefits or security that come with a permanent position. The workforce under such conditions often lacks job security, benefits, or long-term career prospects, which can lead to increased economic vulnerability for workers.

Among the options provided, the one that best defines the casualisation of the workforce is:

(2) The process of moving from self-employment and regular salaried employment to casual wage work.

This option correctly captures the essence of the casualisation of the workforce, describing the transition from more stable and secure forms of employment to less stable and often more precarious forms of casual wage work.