(1):
(prep.) In company or association with respect to place or time; as, to live together in one house; to live together in the same age; they walked together to the town.
(2):
(prep.) In or into union; into junction; as, to sew, knit, or fasten two things together; to mix things together.
(3):
(prep.) In concert; with mutual cooperation; as, the allies made war upon France together.