To accept (a set of generally agreed rules, or a suggestion).
It seemed like a good idea, so we fell in with it.
Pretending to fall in with his views, the ambassadors obtained a written agreement signed by the chief conspirators, and informed Q.
This circumstance alone is sufficient to give it an urgent claim on our attention, whether it suit our taste and fall in with our religious and philosophical views or not.
Our people who are out against the plundering Hottentots, can effect nothing, neither can they effect anything against us; thus during the whole week they have been vainly trying to get at our cattle, and we have been trying vainly to get at their persons; but we will hope that we may once fall in with them in fine weather, and that the Lord God will be with us.
Why is it that people give up the doctrines of grace if they fall in with eloquent advocates of free will?
You will fall in with some men with shaven crowns; smite them thereon with the sword.