a word, statement, or message: anything that is said, whether a single saying, a whole teaching, or, in its loaded Christian use, the message of the gospel itself.
This is the broad heart of the word and accounts for most of its hundreds of appearances. At its simplest it is one thing said, a saying or a remark. Widen the frame and it becomes a connected stretch of speech: a teaching, a sermon, a conversation, a written report. The thread running through all of it is content that has been put into words and can be heard, repeated, believed, or rejected.
The Gospels lean heavily on this range. Jesus speaks a single healing word at a distance, teaches in long stretches his hearers either keep or throw away, and news about him travels as a spreading report. The same word covers the brief and the lengthy, the spoken and the written, because the common factor is simply what was said.
From this ordinary base the early church drew out a charged, almost technical use: "the word" with no further description, or "the word of God," "the word of the Lord," "the word of the cross." It names the one message about Jesus that the apostles announced. The book of Acts can even speak of this word "growing" and "multiplying," as though the message were itself alive and on the move. It is still a thing said, but it has become the thing said above all others.