> [!Definition] > Let $n\geq 1$ and $\underline{v}, \underline{w} \in \mathbb{R}^{n}$ be elements of the [[Real n-Space|real n-space]]. Then $\underline{v},\underline{w}$ are *collinear* iff $\underline{v} = \lambda \underline{w}$ or $\underline{w}=\lambda \underline{v}$ for some $\lambda \in \mathbb{R}$.