Mode

undefined:

A mode is a specific state of functioning of a system member. For example, a member may have a mode in which they do not feel external emotions and only recite information. This is neither a version of the member, nor a facet, but a temporal state that has very little individuality separate from its center (the member in question).

Modes can be very one-dimensional and serve a specific purpose, or only come in due to highly specific things, though this is not necessarily the case. Modes may generally be considered a level underneath facets, going headmate -> facet -> mode.

History
From extranth's coining post : "'The term “mode” has been used loosely in the plural community before according to some people I’ve spoken with, but it has never been officially coined as far as I can tell.'"

Related Terms
Modes may be similar to subfacets.

In schema therapy, the personality of a person is represented through a number of modes as well, with a very similar definition.