http://www.accesstoinsight.org/tipitaka ... html#fn-57
"note 57: 'Sa-uttara', and 'anuttara' are relative terms, indicating inferior and superior states of mind. A state of mind that has some other state of mind superior to it, and is therefore inferior, is sa-uttara citta; a state of mind that is superior to some other state of mind is anuttara citta. Kāmāvacara citta, the state of mind of the sensuous realms, is inferior to the rūpa and arūpa jhāna states of mind.
The rūpa jhāna state of mind is inferior to the arūpa jhana state of mind, but is superior to the kāmāvacara state of mind. In vipassanā practice, the arūpa jhāna state of mind is superior to both the rūpa jhāna and the kamavacara states of mind. Within the stages of the jhānas themselves, each jhāna is relatively inferior or superior, progressing to the nevasaññānāsaññāyatana jhāna which is the highest state of mind. An ordinary yogi who has no experience of jhāna cannot concentrate on the mahaggara or anuttara states of mind.
As a matter of fact, anuttara is normally an epithet for Lokuttarā citta or Magga-phala citta. However, in vipassanā practice, the yogi can concentrate only on the five upādānakkhandhas, the five Aggregates which form the objects of Clinging. He cannot concentrate on Magga-phala citta. Therefore, jhānas are given the epithet anuttara. (The Commentary)"