Easton's Bible Dictionary

(Deuteronomy 32:27, R.V.). The Authorized Version reads, "should behave themselves strangely;" i.e., not recognize the truth, misunderstand or mistake the cause of Israel's ruin, which was due to the fact that God had forsaken them on account of their apostasy.

Noah Webster's New International Dictionary of the English Language

(v. t.) To misjudge.