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The meaning of ALONG is in a line matching the length or direction of; also : at a point or points on. How to use along in a sentence.

ALONG definition: through, on, beside, over, or parallel to the length or direction of; from one end to the other of. See examples of along used in a sentence.

a long (əˈlɔŋ, əˈlɒŋ) prep. 1. over the length or direction of: walking along the highway. 2. in the course of: I lost my hat along the way. 3. in conformity or accordance with: along the lines suggested.

ALONG meaning: 1. from one part of a road, river, etc. to another: 2. in a line next to something long: 3. at a…. Learn more.

Along means "moving constantly in line with." When you walk along the road, you're going forward, keeping the road at your side. You can move along a path or drive along a highway, and you can also figuratively move along: "I learned a lot along the way."