Decoralot is reader-supported and independent. Our guidance is based on research and hands-on evaluation, never on who pays a commission. See how we choose.
Interior design has a vocabulary of its own, and not knowing it puts you at a quiet disadvantage when you're shopping in showrooms, reading product descriptions, and in conversations with anyone in the trade. The terms aren't hard; they're just rarely explained in one place. This glossary collects the ones you'll actually encounter when furnishing a home, grouped by theme so they build on each other rather than sitting in an alphabetical jumble. Learn these and product listings stop being opaque, showroom conversations get easier, and you start to see the decisions behind a well-designed room.
Furniture & Construction Terms
Apron — The horizontal panel beneath a tabletop or seat that connects the legs and adds structural support
Bombe — A chest or cabinet with a curved, bulging front and sides, associated with French and Italian Baroque design
Case goods — Industry term for furniture used for storage (dressers, cabinets, bookcases) as opposed to upholstered or "soft" furniture
Dovetail — An interlocking wedge-shaped joint used at drawer corners; a hallmark of quality construction
Kiln-dried — Wood dried in a controlled oven to remove moisture so it won't warp or crack; the mark of a quality furniture frame
Veneer — A thin layer of real wood bonded over a less expensive core; quality varies with the core beneath it.
Mortise-and-tenon — A strong peg-and-socket wood joint used in well-made frames. Our quality furniture guide shows several of these in action.
Upholstery & Textile Terms
Bouclé — A looped, nubby yarn (and the fabric woven from it) prized for cozy texture
Double rubs — A measure of a fabric's abrasion resistance; higher numbers mean more durable upholstery
Nailhead trim — Decorative metal studs applied along the edges of upholstered furniture
Pile — The raised surface of a fabric or rug, made of upright fibers (as in velvet or a plush carpet)
Performance fabric — Engineered synthetic-blend upholstery designed for stain resistance and durability
Sateen vs percale — Two sheet weaves: percale is crisp and cool (one-over-one), sateen is silky and smooth (more surface float)
Welt (or piping) — A fabric-covered cord sewn into a seam for definition. Learn the durability side in our upholstery fabric guide.
Color, Light & Finish Terms
Undertone — The subtle secondary hue within a color (a "white" may lean warm-cream or cool-blue); clashing undertones are why some rooms feel subtly off
Tone-on-tone — A palette using varied shades of a single color for a layered, cohesive look
Patina — The soft sheen or surface character a material develops with age and use, especially on wood, leather, and metal
Ambient, task, and accent lighting — The three layers of a well-lit room: overall illumination, focused work light, and decorative highlight
Sconce — A wall-mounted light fixture
Color temperature — How warm (yellow) or cool (blue) a light source reads, measured in Kelvin
Sheen — A paint's level of gloss, from flat/matte to high-gloss. See colors that make a room look expensive for undertone in practice.
Layout & Proportion Terms
Focal point — The element a room is arranged around (a fireplace, a bed, a large artwork)
Negative space — The intentional empty area around objects that lets them breathe; a hallmark of considered rooms
Scale — How the size of a piece relates to the room and to other pieces; correct scale is what makes a room feel right
Sightline — The view from one point in a space to another; good layouts protect clear sightlines
Traffic flow — The paths people take through a room; furniture should never block them
Vignette — A small, deliberately styled arrangement of objects (on a mantel or console)
Zoning — Dividing an open-plan space into functional areas using rugs, furniture, or lighting.
Style & Movement Terms
Mid-century modern — The clean-lined, organic-shaped design of roughly the 1940s–60s
Transitional — A blend of traditional and contemporary elements; the most popular "safe luxury" style
Quiet luxury — Understated, high-quality design that avoids logos and display (see our history of quiet luxury)
Wabi-sabi — A Japanese aesthetic finding beauty in imperfection and age
Maximalism — A deliberately abundant, layered, more-is-more approach
Modern organic — Clean lines softened by natural materials and earthy tones
Biophilic design — An approach that connects interiors to nature through plants, natural light, and materials. Knowing these lets you name what you're drawn to which is the first step to a coherent home
Frequently Asked Questions
What is the difference between scale and proportion in design?
Scale refers to how the size of a piece relates to the room and to the people in it (a sofa that's the right scale fits the space comfortably). Proportion refers to how the parts of something relate to each other and to the whole. In practice, correct scale is what makes a room feel balanced rather than cramped or sparse.
What does 'case goods' mean in furniture?
'Case goods' is the industry term for furniture used primarily for storage or surface — dressers, cabinets, bookcases, nightstands, and tables — as opposed to upholstered 'soft' furniture like sofas and chairs. It's the kind of term you'll hear in showrooms and product categories.
What is patina?
Patina is the soft sheen, color shift, or surface character a material develops naturally with age and use — most noticeably on wood, leather, and metal. Rather than being wear to avoid, patina is often prized as a sign of quality and authenticity, especially in full-grain leather and solid wood, which 'wear in' rather than wearing out.
What does tone-on-tone mean?
Tone-on-tone describes a palette built from varied shades and textures of a single color — for example, layering cream, oatmeal, and soft taupe. It creates a cohesive, layered, sophisticated look and is a core technique behind rooms that read as expensive, since it relies on subtle harmony rather than high contrast.