It is the most immediate form of musical expression in existence, and the language that we use to state our deepest, truest feelings.

CNN: What is jazz?

Instead, they are jewelry for the feet or a form of personal expression.

FORBES: How To Find Comfortable Shoes That Don't Compromise Style

Ms. LATIFAH: For me, hip-hop has been the catalyst for everything, a form of expression, a way for me to kind of get my feelings out and, you know, release whatever is going on inside.

NPR: Queen Latifah on New HBO Movie 'Life Support'

The hashtag is closely associated with Twitter, and fans of the service use the hashtag as short-form creative expression.

WSJ: Facebook Working on Incorporating the Hashtag

But more recently, a real trend is emerging toward the use of data as a form of self expression.

FORBES: Your Data Is the New Black

Valeo, which stated that donating money was a form of expression protected by the First Amendment of the Constitution.

BBC: Federal matching funds

Early flamenco was cante jondo (deep song), an anguished form of expression for a people on the margins of society.

BBC: I came here to learn flamenco

From the runway to main street, nail art has emerged as a democratic form of self-expression in which anyone can participate.

CNN: On main street and the runway, nail art is the new lipstick

His mode of expression (in wonderful English) is often soulful, yet the movie, though conventional in form, brings us close to an elemental ferocity just barely held in check.

NEWYORKER: You Cannot Start Without Me��Valery Gergiev, Maestro

The decision to first of all think of creating something that didn't exist before, and then after that to give the creation form and expression in a way that can be made into a business.

WSJ: Rei Kawakubo