Mortar/ˈmɔːrtər/ Definition 1 of 3Pro Tip 1/3Construction Context Mortar is often used in construction and civil engineering conversations. The new wall will need fresh mortar for stability. Pro Tip 2/3Literal and Figurative Besides its literal meaning, 'mortar' can imply the basis or support that holds things together. Mutual respect is the mortar of a strong team. Pro Tip 3/3Building Maintenance Mortar degrades over time, so it's often discussed in the context of repairs. The historic building's mortar has begun to crumble.