These fifteen psalms form a short psalter within the Psalter, each having the same title (with a slight grammatical variation in Psalm cxxi.). Its meaning is very doubtful. Many of the older authorities understand it to signify "a song of steps," and explain it by a very uncertain tradition that these psalms were sung on fifteen steps leading from the court of the women to that of the men, each on one step. The R.V.'s rendering, "degrees," uses that word in this sense (like the Latin _gradus_). But though undoubtedly the word means steps, there is no sufficient support for the tradition in question; and, as Delitzsch well observes, if this were the meaning of the title, "it would be much more external than any of the other inscriptions to the Psalms."
Another explanation fixes on the literal meaning of the word--_i.e._, "goings up"--and points to its use in the singular for the Return from Babylon (Ezra vii. 9), as supporting the view that these were psalms sung by the returning exiles. There is much in the group of songs to favour this view; but against it is the fact that Psalms cxxii. and cxxxiv. imply the existence of the Temple, and the fully organised ceremonial worship.
A third solution is that the name refers to the structure of these psalms, which have a "step-like, progressive rhythm." This is Gesenius' explanation, adopted by Delitzsch. But the peculiar structure in question, though very obvious in several of these psalms, is scarcely perceptible in others, and is entirely absent from Psalm cxxxii.
The remaining explanation of the title is the most probable--that the "goings up" were those of the worshippers travelling to Jerusalem for the feasts. This little collection is, then, "The Song Book of the Pilgrims," a designation to which its contents well correspond.