To talk about or emphasize something excessively and perhaps repetitively, usually to the extent that the listener becomes bored or annoyed. A: "I don't mean to labor the point, but I'm just worried that there won't be enough food at the party." B: "Yeah, we know, you've said that 10 times now." I'm only laboring the point because we still haven't reached a decision.

To work very hard or diligently to accomplish something. I've been laboring at my Ph.D. for nearly four years now. Pat's out back laboring at repainting the back wall.

To work very hard or diligently (to accomplish something). I've been laboring away at my Ph.D. for nearly four years now. Pat always spends his Saturdays laboring away in the back garden.

To put in a lot of time, energy, and effort to successfully accomplish or complete something. I've been laboring over this dissertation for months now. My wife likes to plan every minute of our vacation, laboring over the tiniest details.

To live, function, or operate while believing something or holding an assumption of some kind, especially something that is not or may not be true. We all labored under the assumption that we would be getting paid overtime, so we all nearly quit when we realized that wasn't the case These politicians want us all to labor under the notion that they're our friends, looking out for our interests first and foremost.