What is a "soma holiday"? why does lenina go on one?

 The answer is:

The administration gives huge numbers techniques with stay with those number cheerful and calm, including the utilization of a pill known as soma.

 A soma holiday will uproot person starting with those barbarous actuality for Every day life and anything that may be annoying. Kin detract the pill so as with try for a "holiday" starting with any sort of despondency. 
Lenina’s part all around the section will be a latent one, for those self-evident motivation behind that she may be for soma-holiday to the majority for it.

Setting off once soma-holiday will be her main method for managing those negative feelings moved by those reservation. When Lenina and Bernard a chance the stirring waters of the English channel. He sees a delightful show for nature's power and it is an frightfully terrifying scene that she needs to avoid. It is especially unexpected that she dives ahead soma-holiday in the center for the thing that if bring been a true occasion.