ETYM French actif, Latin activus, from agere to act.
1. Characterized by energetic activity.
2. Characterized by energetic bodily activity; SYN. physical.
3. (Grammar) Expressing action rather than a state of being; used of verbs (e.g. 'to run') and participial adjectives (e.g. 'running' in 'running water'); SYN. dynamic.
4. (Military) Engaged in or ready for military or naval operations; SYN. combat-ready, fighting.
5. (Of e.g. volcanos) Being in a state of action or potential action.
6. (Pathology) Tending to become more severe or wider in scope.
7. Being in physical motion; SYN. on the move.
8. (Astronomy; of the sun) Characterized by a high level activity in sunspots and flares and radio emissions.
9. Disposed to take action or effectuate change.
10. Exerting influence or producing an effect.
11. Engaged in full-time work; (military).
12. In operation.
13. Taking part in an activity; SYN. participating.
ETYM Old Eng. actuel, French actuel, Latin actualis, from agere to do, act.
1. Being or existing at the present moment.
2. Being or reflecting the essential or genuine character of something; SYN. genuine, literal, real.
3. Of the nature of fact; having actual existence; SYN. factual.
4. Presently existing in fact and not merely potential or possible; SYN. existent.
5. Taking place in reality; not pretended or imitated.
ETYM Latin concretus, p. p. of concrescere to grow together; con- + crescere to grow; cf. French concret. Related to Crescent.
1. Capable of being perceived by the senses; not abstract or imaginary.
2. Formed by the coalescence of particles.
ETYM Latin effectivus: cf. French effectif.
1. Able to accomplish a purpose; functioning effectively; SYN. efficient.
2. Producing or capable of producing an intended result or having a striking effect; SYN. effectual, efficacious.
3. Working well as a means or remedy.
4. Existing in fact; not theoretical; real.
5. Exerting force or influence; SYN. good, in effect, in force.
6. (Military) Equipped and ready for service.
1. Exerting or capable of exerting strong physiological or chemical effects.
2. Sufficient to produce a result.
ETYM Latin efficiens, -entis, p. pr. of efficere to effect: cf. French efficient. Related to Effect.
Being effective without wasting time or effort or expense.
ETYM Old Eng. naturel, French naturel, from Latin naturalis, from natura. Related to Nature.
1. Existing in or in conformity with nature or the observable world.
2. Existing in or produced by nature.
3. In accordance with or determined by nature or natural laws.
4. Involving or derived from living organisms; free from chemical treatments or additives; SYN. nonsynthetic.
5. Relating to or concerning nature.
6. Related by blood; not adopted.
7. (Used especially of commodities) In the natural unprocessed condition; SYN. raw, rude.
8. (Music) Of a key containing no sharps or flats.
9. (Biology) Functioning or occurring in a natural way; lacking abnormalities or deficiencies.
ETYM Cf.French objectif.
1. Undistorted by emotion or personal bias; based on observable phenomena; SYN. nonsubjective.
2. Emphasizing or expressing things as perceived without distortion of personal feelings or interpretation.
3. Belonging to immediate experience of actual things or events.
4. (Grammar) Serving as or indicating the object of a verb or of certain prepositions and used for certain other purposes; SYN. accusative.
1. According with material things or natural laws
2. Concerned with material things
3. Having substance or material existence; perceptible to the senses; SYN. tangible, touchable.
4. Involving the body as distinguished from the mind or spirit
5. Relating to the sciences dealing with matter and energy; especially physics
ETYM Old Eng. positif, French positif, Latin positivus. Related to Position.
1. Characterized by or displaying affirmation or acceptance or certainty etc.
2. (Mathematics) Greater than zero.
3. Having a positive electric charge; SYN. electropositive.
4. (Medicine) Indicating existence or presence of a suspected condition or pathogen; SYN. confirming.
5. Formally laid down or imposed; SYN. prescribed.
ETYM Latin practicus active, Greek, fit for doing or performing, practical, active, from prassein to do, work, effect: cf. French pratique, formerly also practique. Related to Pragmatic, Practice.
1. Concerned with actual use or practice.
2. Having or put to a practical purpose or use.
ETYM Late Lat. realis, from Latin res, rei, a thing: cf. French réel. Related to Rebus.
1. Not synthetic or spurious; of real or natural origin; SYN. true.
2. Being or occurring in fact or actuality; having verified existence; not illusory;SYN. existent.
3. Possible to be treated as fact; SYN. tangible.
4. Founded on practical matters.
5. Not to be taken lightly.
6. No less than what is stated; worthy of the name.
7. (Of property) Fixed or immovable.
8. (Economics) Being value measured in terms of purchasing power.
1. Aware or expressing awareness of things as they really are.
2. Of or relating to the philosophical doctrine of realism.
ETYM French substantiel, Latin substantialis.
1. Being the essence or essential element of a thing; SYN. substantive, in essence.
2. Having substance or capable of being treated as fact; not imaginary; SYN. real, material.
ETYM Latin substantivus: cf. French substantif.
(Law) Applying to essential legal principles and rules of right; SYN. essential.
Pertaining to or like a substance or entity; existing alone; independent; substantial; solid; essential; real, actual; Grammar, expressing existence.
ETYM French véritable. Related to Verity.
Actual; real; true; genuine.
1. Precisely as stated.
2. Used to give emphasis to the relevance of the thing modified.
ETYM Cf. French virtuel. Related to Virtue.
1. Being actually such in almost every respect; SYN. practical.
2. Being such in essence or effect though not in actual fact.
In computing, without physical existence. Some computers have virtual memory, making their immediate-access memory seem larger than it is; some computers can also simulate virtual devices. For example, the Acorn A3000 and A5000 computers have only one floppy-disc drive but can behave as if they were equipped with two, using part of the RAM to simulate the second drive. Virtual reality is a computer simulation of a whole physical environment.