1. A brief, transient moment that passes quickly and is short-lived; a temporary instance that does not last long
The sunset was a fleeting moment of pure beauty.
O pôr do sol foi um momento efêmero de pura beleza.
2. An evanescent or ephemeral period of time; something momentary and impermanent
Childhood memories are often just fleeting moments we try to hold onto.
As memórias da infância são frequentemente apenas momentos efêmeros que tentamos reter.