at a sitting

At one time, during one period. For example, The cruise ship could feed about 500 passengers at a sitting, or We read the entire poem at a sitting. Since the word sitting implies just that posture, the term means “during a period when one is seated and engaged in a single continuous activity.”

Words nearby at a sitting

at, at a discount, at a loss, at a low ebb, at a premium, at a sitting, at a stretch, at a time, at a word, at about, at all