(1):

(n.) A kind of wild red cherry.

(2):

(superl.) Causing laughter, mirth, gladness, or delight; as, / merry jest.

(3):

(superl.) Laughingly gay; overflowing with good humor and good spirits; jovial; inclined to laughter or play; sportive.

(4):

(superl.) Cheerful; joyous; not sad; happy.