mark, sign; image; target, object; cause, condition. These meanings are used in, and adapted to, many contexts of which only the doctrinal ones are mentioned here.
1.”Mental (reflex-) image”, obtained in meditation. In full clarity, it will appear in the mind by successful practice of certain concentration-exercises and will then appear as vividly as if seen by the eye. The object perceived at the very beginning of concentration is called the preparatory image (parikamma-nimitta). The still unsteady and unclear image, which arises when the mind has reached a weak degree of concentration, is called the acquired image (uggaha-nimitta). An entirely clear and immovable image arising at a higher degree of concentration is the counter-image (patibha^ga-nimitta). As soon as this image arises, the stage of neighbourhood (or access) concentration (upaca^ra-sama^dhi) is reached. For further details, s. kasina, sama^dhi.
2.”Sign of (previous) kamma” (kamma-nimitta) and ”sign of (the future) destiny” (gati-nimitta); these arise as mental objects of the last karmic consciousness before death (marana^sanna-kamma; s. karma, III, 3).
Usages (1) and (2) are commentarial (s. App.). In sutta usage, the term occurs, e.g. as:
3.”Outward appearance”: of one who has sense-control it is said- that "he does not seize upon the general appearance” of an object (na nimittagga^hi^; M. 38, D. 2; expl. Vis I, 54f; see si^la).
4.”Object”: the six objects, i.e. visual, etc. (rúpa-nimitta; S. XXII, 3). Also, when in explanation of animitta-cetovimutti, signless deliverance of mind (s. cetovimutti, vimokkha), it is said, ”sabba-nimitta^nam amanasika^ra^”, it refers to the 6 sense-objects (Com. to M. 43), and has therefore to be rendered "by paying no attention to any object (or object-ideas)." - A pleasant or beautiful object (subha-nimitta, q.v.) is a condition to the arising of the hindrance of sense-desire; a ”repellent object” (patigha-nimitta) for the hindrance of ill-will; contemplation on the impurity of an object (asubha-nimitta; s. asubha) is an antidote to sense-desire.
5. In Pts.M. II, in a repetitive series of terms, nimitta appears together with uppa^do (origin of existence), pavattam (continuity of existence), and may then be rendered by ”condition of existence” (s. Path, 194f.).
As signifying the mental reflex-image occurring in meditation, this term, singly or in compounds (parikkamma-, uggaha-, patibha^ga-n.), is found only in the Com., Vis.M., etc. The same holds good for kamma-nimitta, gati-nimitta.