1. an imaginary line around which something rotates
2. a reference line used in mathematics to measure coordinates on a graph
Usage: mathematics
3. the main stem of a plant from which leaves and branches grow
Usage: botany

Examples

• The Earth rotates on its axis once every 24 hours.
• The wheel spins around a central axis.
• Plot the points on the x-axis and y-axis of the graph.
• The horizontal axis shows time while the vertical axis shows temperature.
• The plant’s main axis grew straight up toward the sunlight.
• Damage to the axis vertebra can cause serious neck problems.
• The axis of the flower stem was thick and sturdy.