Perfume Jargon, Decoded

Key Takeaways

• Projection is how far a scent travels off your skin. Sillage is the trail it leaves as you move. They are related, not interchangeable.
• Longevity depends on concentration, ingredient quality and your own skin chemistry, not just the bottle's price tag.
• A note is a single ingredient. An accord is several notes working together to read as one thing, sometimes something that doesn't technically exist in nature.
• Dry-down is the part of the perfume that actually matters most. Everything before it is a preview.
• Olfactory families group fragrances by shared character, which is the fastest way to find your next favourite scent.

Walk into a niche boutique and the vocabulary moves fast. Sillage, dry-down, accord, olfactory family. None of it is gatekeeping for its own sake. Once you know what the words mean, you start noticing things about your own perfume you'd never picked up on before. Here's the language, minus the mystique.

Projection: How Far It Travels

Projection is the radius a fragrance creates around you. Some perfumes hold close to the skin. Others fill a room the second you walk in. Neither is better, they're built for different jobs. A heavy oriental might be exactly what a winter evening calls for, while a quiet skin scent is the better call for the office. Niche houses tend to engineer this deliberately, so projection becomes a clue to how a fragrance wants to be worn, not just how strong it is.

Sillage: What You Leave Behind

Sillage gets confused with projection constantly, but they're answering different questions. Projection is how far the scent reaches right now. Sillage is the trail it leaves once you've already walked past. Big sillage makes an entrance memorable. Soft sillage feels closer to a secret, the kind of thing someone only catches if they lean in. Both are worth knowing before you commit a full bottle to one or the other.

Longevity: How Long It Lasts

Longevity is how long a perfume stays detectable on skin, and it's shaped by concentration, the quality of the materials, and your own chemistry more than anything printed on the label. This is why the same fragrance can last all day on one person and vanish in two hours on another. Niche perfumery generally invests in longevity as part of the craft, which is part of why these compositions tend to evolve rather than just fade.

Notes vs Accords: What You're Actually Smelling

A note is a single ingredient, citrus, leather, vanilla, the building blocks of a formula. An accord is what happens when several notes combine to create something that reads as one unified idea, and it's where perfumery stops being chemistry and starts being craft.

Some accords reconstruct things from nature that can't be used directly anymore. Deer musk is increasingly restricted, and natural ambergris is rare enough to be near mythical, so both are rebuilt from other materials to capture the feeling without the source. Other accords are pure invention, abstract ideas with no real-world equivalent, built entirely from imagination. Leather is the classic example: there's no such thing as distilling leather into a bottle, so every leather note you've ever smelled was constructed from scratch. Knowing the difference between a note and an accord changes how you read a fragrance description, and it's usually the moment people start falling for niche over mainstream.

Dry-Down: The Part That Actually Counts

The dry-down is the final act, the stage where a perfume stops performing and starts being honest. Top notes are the introduction. Heart notes are the conversation. The dry-down is what's left once all the noise settles, and it's usually where the real character of a fragrance lives.

This is the section people skip past when they're testing on a card in five seconds flat, and it's exactly why card-testing tells you almost nothing. A perfume's dry-down is where the base notes take over for good, and where a composition either earns its place in your collection or quietly talks you out of the bottle.

Olfactory Families: Your Scent, Categorised

An olfactory family groups fragrances by shared character, the way genres group films. Once you know which family you gravitate toward, woody, floral, oriental, fresh, gourmand, shopping for your next bottle stops being guesswork and starts being targeted. Want the full breakdown? Our guide to fragrance families goes deeper into how each one works.

The Pyramid: Top, Heart, Base

Every fragrance is structured in three acts. Top notes are the opening line, bright and brief. Heart notes carry the body of the story for the next few hours. Base notes are the ending, the part that lingers after everything else has said its piece. Read our full guide to perfume composition for how each layer earns its place in the structure.

Once these terms stop being jargon and start being tools, fragrance shopping changes completely. You'll know why a perfume that smelled incredible on the card fell flat on your skin, and why the one you almost skipped became the one you can't stop wearing.