炮堡 (pào bǎo) is a compound noun meaning 'gun emplacement' or 'artillery fort' — a fortified structure designed to house and protect artillery pieces or machine guns. The first character 炮 (pào) means 'cannon' or 'artillery', while the second, 堡 (bǎo), means 'fort', 'stronghold', or 'small fortress'. Together, they denote a defensive military installation specifically built for firing heavy weapons, often embedded in terrain like hillsides or reinforced with concrete and sandbags.

This term appears frequently in historical and military contexts — especially when describing battlefield defenses from the Sino-Japanese War, Chinese Civil War, or other 20th-century conflicts. While still understood today, 炮堡 is largely archaic in modern usage, replaced by terms like 防御工事 (fángyù gōngshì, 'defensive works') or 火力点 (huǒlì diǎn, 'firepoint'). It carries strong connotations of static, entrenched warfare and is rarely used for contemporary military infrastructure.