Noun secularisation has 2 senses

• secularisation(n = noun.act) secularization - the activity of changing something (art or education or society or morality etc.) so it is no longer under the control or influence of religion; Array
is a kind of change
Derived form verb secularise₁

• secularisation(n = noun.act) secularization - transfer of property from ecclesiastical to civil possession; Array
is a kind of transfer, transference