'Word' in the Bible

and we possess [as] more reliable the prophetic word, to which you do well [if you] pay attention to [it] as to a lamp shining in a dark place, until the day dawns and the morning star rises in your hearts,

For [when] they maintain this, it escapes [their] notice that the heavens existed long ago and the earth held together out of water and through water by the word of God,

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