IdiomDaily LifeEnglish

up in the air

Meaning: Unsettled or undecided.

Example: “Our summer plans are still up in the air.”

Origin: The idiom's modern figurative sense of something undecided or unresolved is documented in print by 1752, though "up" itself was only added to the earlier, simpler "in the air" in the first half of the 1900s. Exactly which image inspired the phrase remains genuinely unsettled. One theory points to dust or small particles floating freely, never settling firmly onto solid ground, offering a literal picture of something with no fixed, final resting place. A second, less certain theory reaches for a coin flip, with the outcome plainly unknowable for as long as the coin is still spinning in midair. A third simply notes the phrase's kinship with older, related expressions like "in mid-air" or "aloft," already common well before the specific figurative idiom took hold. No single explanation is confirmed over the others.

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