Pore/pɔːr/ Definition 1 of 2Pro Tip 1/3Visual Imagery Picture small openings on surfaces to understand 'pore' as a noun. Microscopes reveal the pores in a leaf. Pro Tip 2/3Not Just Skin 'Pore' can refer to any tiny opening, not only on human skin. The porous rock had water streaming through its pores. Pro Tip 3/3Breathability 'Pore' conveys breathability in materials like fabric. The jacket's fabric has pores to allow sweat to evaporate.