Mark Helperin’s article titled “Romney’s Conservative Critics” in Time magazine (September 28) begins with the following sentence:
“On “Morning Joe,” I key off Charles Krauthammer’s column to talk
about a key part of Romney’s challenge: “If you watch conservative media, read Krauthammer, watch Fox, or talk
privately with any Republican politician, it’s hard to find anybody,
even some people, as you all know, inside the Romney campaign, who
think they’re doing the right thing now, that they’re on track to win
despite Governor Romney saying that.”
Though I find “key in,” “key on,” “key to,” and “key up,” I cannot find the entry of “key off” in any of Cambridge, Oxford, and Merriam-Webster dictionary, despite all of them register “off-key” as adjective and verb.
Only wikitionary provides the definition of “key off” as a computing terminology meaning “to take as a controlling input datum.”
What does “key off” somebody’s column exactly mean? Does it mean to pay special attention to something?
What is the currency of “key off” as a verb? Is it popular as “key in (on, to, up), or special to this writer in trying to key “key off” to “key part”? In other word, is this well-received English word?
Best Answer
This is a deceptively interesting question. I understood it intuitively to mean the writer was using the Krauthammer column as a topic that would set the tone for or central idea of his own piece. The usage is a familiar one, found often in journalistic pieces such as this headline.
The phrase says a lot in a few letters, rendering it ideal for headlines.
Still, when I went to look up the term in various dictionaries, I came up empty for an exact match. I think the term must be deconstructed before it can be explained. Let's look at the preposition first. I believe it is used in the following sense (all citations from Webster's 3rd New Int'l Dictionary):
We see this usage of off in informal English (as a substitute for from), in such constructions as
So, let's suppose the off in "key off" means from. Next, let's look at the verb. This is used in the musical sense, as Affable Geek notes, but here is a dictionary citation that gives its exact definition:
Putting those together we get the sense of "key off" to mean (literally) "fix or determine the musical pitch from" another instrument or voice. I can attest that in orchestras, which I used to play in, this is customarily the principal oboe; in choirs it is a piano or a small reed-based device used for giving a pitch, or a choir member with perfect pitch or good relative pitch. The given pitch is a starting point for in-tune playing and harmonizing.
The literal usage has been overwhelmed by the figurative usage, though. To "key off" has come to mean to take a prompt from something else in order to produce something of one's own. The thing produced may be in concert with the prompt, may echo it or elaborate upon it, or may in some cases even take issue with it.
Finally, whatever @FumbleFingers may feel about the quality of Helperin's sentence
it is fairly obvious that the writer, if he wasn't being merely sloppy, means to decorate his sentence with a play on two meanings of the word key. In keying off Charles Krauthammer's column, Mark Helperin aims to amplify a certain essential feeling of doubt shared by many conservatives with respect to Romney's campaign.