1. In Chemistry:

• Polar Molecule: A molecule with an uneven distribution of electron density, resulting in a partial positive charge on one side and a partial negative charge on the other. This occurs when there is a significant difference in electronegativity between the atoms bonded together.

• Polar Solvent: A solvent composed of polar molecules, like water. Polar solvents are good at dissolving other polar molecules and ionic compounds.

2. In Geography:

• Polar Regions: The regions around the North and South Poles, characterized by cold temperatures, ice, and unique ecosystems.

3. In Mathematics:

• Polar Coordinates: A coordinate system that specifies a point in a plane by a distance from a reference point (the pole) and an angle from a reference direction.

4. In Optics:

• Polarized Light: Light in which the electric field vectors are oscillating in a single plane.