Another appealing free event this week offers dance in rather less ephemeral form.

One took the ephemeral form of mail art.

No one has ever written more scathingly about the perils of this ephemeral form.

Art has spilled out of its classical containers into performance, the media, fashion and other ephemeral forms of expression.

There have of course been many other visits which were either not documented or else which were presented in an ephemeral form.

The ephemeral forms swirled a moment and then separated into ragged wisps, as if a hand had brushed through smoke.

An older meaning of the term is closer to pamphleteer: someone who circulates ideas by publishing them, perhaps in ephemeral forms.

Today, many people, including me, use e-mail, an ephemeral form of communication easily created and deleted.

Most exist only on a local, even household, level and in abstract and ephemeral forms.

Other sections of the show document more ephemeral forms of the urban spectacle.