Definiton: a special occasional dinner party.

Collocation: at a/the feast - the feast of

Example: I invited my friends to my Lunar New Year feast.

Definition: a light growth that makes up the covering of a bird's body.

Example:  The feather is so light.

Definition: without a weakness or defect and therefore perfect.

Example: Her English is almost flawless.

Ex: Light is usually best when it is fleeting or dappled, razor sharp or threatening or atmosphere.