Hi it means 'in the future, at a future time, at a later stage' but I'm not sure of the origin, often the meaning of an idiom doesn't correspond with the words in the phrase. Examples if the phrase would be: 'At the moment I'm learning Spanish but further down the line I want to learn Italian.' 'If you drink too many fizzy drinks, down the line you'll have stomach problems.' Paul

The expression is likely a figure from railway lines that then gets inflected by process management such as factory assembly lines, supply lines, et cetera.

Hi, I agree with the other two answers. It's an idiom which gives the person some flexibility when they are uncertain as to when the event / action will take place. It's commonly used in business settings when people don't want to set tasks with concrete deadlines or solve a problem immediately. Some examples: Let's agree on the strategy at some point down the line. I'm sure it's something we'll resolve down the line. It's not today's discussion but we'll address it down the line.

Hi! "down the line" means something in the more distant future, rather than the immediate future, but does not specify exactly when this will be. For example a person in business may say "It's something we're going to look at down the line", which would suggest they are going to research something new in the future. I hope that helps!

We can also say, "I'm heading down the line." This refers to going south somewhere. Its like the line is the road. If I was in San Francisco. I could say, "I'm heading down the line to San Diego."