'Word' in the Bible

So we have the prophetic word made more certain. You do well to pay [close] attention to it as to a lamp shining in a dark place, until the day dawns and light breaks through the gloom and the morning star arises in your hearts.

For they willingly forget [the fact] that the heavens existed long ago by the word of God, 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, being kept for the day of judgment and destruction of the ungodly people.