'Meaningless' in the Bible

Do not bring any more meaningless offerings; I consider your incense detestable! You observe new moon festivals, Sabbaths, and convocations, but I cannot tolerate sin-stained celebrations!

Indeed, they will hear meaningless gibberish, senseless babbling, a syllable here, a syllable there.

So the Lord's word to them will sound like meaningless gibberish, senseless babbling, a syllable here, a syllable there. As a result, they will fall on their backsides when they try to walk, and be injured, ensnared, and captured.