'Word' in the Bible

But the queen Vashti refused to come at the word of the king which was sent by the chamberlains; and the king was very wroth, and his fury burned in him.

What shall be done to the queen Vashti according to law, because she has not performed the word of the king Ahasuerus by the chamberlains?

And the saying pleased the king and the princes; and the king did according to the word of Memucan.

If I have found grace in the sight of the king, and if it please the king to grant my petition, and to perform my request, let the king and Haman come to the banquet that I shall prepare for them, and I will do to-morrow according to the king's word.

And the king returned out of the palace garden into the house of the banquet of wine, and Haman was fallen upon the couch on which Esther was. And the king said, Will he even force the queen before me in the house? The word went forth out of the king's mouth, and they covered Haman's face.