(1):

(n.) The oblation of the elements.

(2):

(n.) An anthem chanted, or a voluntary played on the organ, during the offering and first part of the Mass.

(3):

(n.) The act of offering, or the thing offered.

(4):

(n.) The Scripture sentences said or sung during the collection of the offerings.

(5):

(n.) The offerings themselves.

(6):

(n.) That part of the Mass which the priest reads before uncovering the chalice to offer up the elements for consecration.