The Bible commentator, David Pawson, describes the use of logos from John 1:1 as "the reason why". (page 553)
[Heraclitus] used the word logos to stand for 'the reason why', the purpose behind what took place. When he looked at life (bios) he looked for the logos; when he studied the weather (meteor) he sought the logos. This concept now appears in our words for the study of different areas in science: biology, meteorology, geology, psychology, sociology, etc.
Pawson then claims that John did something similar:
John, realizing that Jesus is the ultimate reason 'why' everything happened, took up this idea and called Jesus the logos, 'the Word'. The whole universe was made for him. He was the Logos before there was anyone else to communicate with. That is the reason why we are here. It is all going to be summed up in him. He is the 'Reason Why'.
Based on the above, one theistic interpretation of "Logos" as a description of Jesus is "the reason why".
Pawson, D. Unlocking the Bible. (2007) HarperCollins and True Potential Publishing.