'Word' in the Bible

So we have the prophetic word made more sure, to which you do well to pay attention as to a lamp shining in a dark place, until the day dawns and the morning star arises in your hearts.

For when they maintain this, it escapes their notice that by the word of God the heavens existed long ago and the earth was formed out of water and by water,

But by His word the present heavens and earth are being reserved for fire, kept for the day of judgment and destruction of ungodly men.