The fife is a type of woodwind instrument that produces a bright, piercing sound, typically made of metal or wood. It is commonly associated with military music and marching bands, where it plays a crucial role in signaling and keeping rhythm. In Archibald MacLeish's poem "Youth is old before his time," the mention of a "merry fife" contrasts with the themes of loss and sorrow, highlighting the absence of joy and vitality in youth. The fife symbolizes the lively music and carefree spirit that youth should embody but is missing in the poem's context.

The fife has historical roots dating back to the 15th century and was commonly used in military contexts to accompany drums. It is often confused with the flute, but the fife is smaller and has a more limited range. Related terms include "flute" and "piccolo," which are also woodwind instruments but differ in size, sound, and playing technique. When discussing musical instruments in poetry, it's important to consider how they contribute to the poem's themes and emotions, as seen in MacLeish's work. The etymology of "fife" is believed to derive from the Middle English word "fife," which itself comes from the Old French "fife."