A "mullion" refers to a vertical or horizontal structural element that divides adjacent window units or panels within a curtain wall or window system. Mullions are essential components in the design and construction of facades, providing both structural support and aesthetic division. They help to transfer loads from the glass or panels to the building structure, ensuring stability and integrity. Mullions can be made from various materials, including aluminum, steel, or wood, depending on the design requirements and architectural style of the building. In modern commercial construction, aluminum is a popular choice due to its strength, lightweight nature, and resistance to corrosion.

A "mortise" refers to a cavity or hole that is cut into a piece of material, typically wood, to receive a corresponding projection known as a tenon. This joint is commonly used in woodworking and carpentry to connect two pieces of wood at an angle, usually at 90 degrees, forming a strong and stable connection. The mortise-and-tenon joint is a traditional and widely used method for joining structural elements, such as beams and posts, in construction. It is valued for its strength and durability, making it a preferred choice in various construction applications, including framing, cabinetry, and furniture making.

Mortar joints refer to the space between bricks, blocks, or other masonry units that are filled with a mixture of cement, fine sands, water, and sometimes lime . The primary function of mortar joints is to bond the masonry units together, providing structural integrity and stability to the building

Mortar is a paste-like substance primarily used for binding together bricks, stones, or other building units to create structures like walls or masonry . In the context of Australian commercial construction projects, mortar is typically a mixture of a binder (usually Portland cement), sand, and water

The term "monolithic" refers to a building technique that involves creating a structure as a single, continuous unit, typically using materials like concrete . This method emphasizes uniformity, continuity, and an unbroken presence, resulting in a structure that is cast without joints or separate construction elements

Moisture content refers to the amount of water present in a material, usually expressed as a percentage of the material's dry weight . In Australian commercial construction projects, moisture content is a critical factor that can impact the quality and durability of the building.

A moisture barrier, often referred to as a vapor barrier or damp-proof membrane, is a material or system used to prevent the passage of moisture into building elements. Its primary function is to protect the structural integrity of a building by preventing moisture-related issues such as mold growth, wood rot, and corrosion of metal components.

In the context of Australian commercial construction projects, a "module" typically refers to a prefabricated section or unit of a building that is manufactured off-site and then transported to the construction site for assembly. This modular construction approach is increasingly popular due to its efficiency, cost-effectiveness, and ability to reduce construction time and waste.

"Mitre" typically refers to a type of joint or cut where two pieces are joined at an angle to form a corner, often at 45 degrees, to create a 90-degree corner. This term is commonly used in carpentry, joinery, and various construction tasks where precise angular cuts are necessary to ensure a clean and aesthetically pleasing finish. Mitre joints are frequently used in the construction of frames, moldings, and trim work. The precision of a mitre cut is crucial for the structural integrity and visual appeal of the finished product.

In the context of Australian commercial construction projects, "milled" refers to the process of transforming raw materials, such as wood or metal, into highly accurate building components using automated, computer-controlled machines, such as Computer Numerical Control (CNC) milling machines .

In the case of timber, milled products include sawn timber, which is cut from logs into different shapes and sizes, such as solid timber beams and rectangular timber sections . The milling process involves cutting, shaping, and smoothing the raw materials to produce the desired shape and size.

A matrix mixture of sand and cement typically refers to a specific blend of these materials used to create concrete or mortar. This mixture serves as a binding agent that holds together aggregates like gravel or crushed stone in concrete, or as a standalone material for mortar used in masonry work.

Mastic is a viscous, sticky substance used as an adhesive, sealant, or filler in Australian commercial construction projects . It is derived from natural resins or synthetic compounds and is commonly employed in various industrial and commercial settings

Master Keying is a system used in Australian commercial construction projects where each lock has its own individual key, which will not operate any other locks in the system . However, all locks can be operated by a master key, allowing hierarchical control of access . This system enables multiple keys to open one or more locks, with varying levels of access.

"masonry" refers to the building technique that involves the use of individual units of natural stone, bricks, or concrete blocks, which are typically bound together by mortar. Masonry is a traditional and durable construction method that is valued for its strength, fire resistance, and aesthetic appeal.  

In the context of Australian commercial construction projects, a "mantel" typically refers to a decorative framework or structure that surrounds a fireplace. It often includes a shelf above the fireplace opening and can be made from various materials such as wood, stone, or metal.