| active | | |
| n. (substance) | 1. active, active agent | chemical agent capable of activity. |
| ~ chemical agent | an agent that produces chemical reactions. |
| n. (linkdef) | 2. active, active voice | the voice used to indicate that the grammatical subject of the verb is performing the action or causing the happening denoted by the verb.; "`The boy threw the ball' uses the active voice" |
| ~ voice | (linguistics) the grammatical relation (active or passive) of the grammatical subject of a verb to the action that the verb denotes. |
| n. (person) | 3. active | a person who is a participating member of an organization.; "the club issues a list of members, both the actives and the retirees" |
| ~ individual, mortal, person, somebody, someone, soul | a human being.; "there was too much for one person to do" |
| adj. | 4. active | tending to become more severe or wider in scope.; "active tuberculosis" |
| ~ pathology | the branch of medical science that studies the causes and nature and effects of diseases. |
| ~ progressive | advancing in severity.; "progressive paralysis" |
| adj. | 5. active, combat-ready, fighting | engaged in or ready for military or naval operations.; "on active duty"; "the platoon is combat-ready"; "review the fighting forces" |
| ~ armed forces, armed services, military, military machine, war machine | the military forces of a nation.; "their military is the largest in the region"; "the military machine is the same one we faced in 1991 but now it is weaker" |
| ~ operational | (military) of or intended for or involved in military operations. |
| adj. | 6. active | disposed to take action or effectuate change.; "a director who takes an active interest in corporate operations"; "an active antagonism"; "he was active in drawing attention to their grievances" |
| ~ activist, activistic | advocating or engaged in activism. |
| ~ hands-on | involving active participation.; "he's a hands-on manager"; "hands-on operations" |
| ~ proactive | (of a policy or person or action) controlling a situation by causing something to happen rather than waiting to respond to it after it happens. |
| adj. | 7. active, participating | taking part in an activity.; "an active member of the club"; "he was politically active"; "the participating organizations" |
| ~ involved | connected by participation or association or use.; "we accomplished nothing, simply because of the large number of people involved"; "the problems involved"; "the involved muscles"; "I don't want to get involved"; "everyone involved in the bribery case has been identified" |
| adj. | 8. active | characterized by energetic activity.; "an active toddler"; "active as a gazelle"; "an active man is a man of action" |
| ~ about, astir | on the move.; "up and about"; "the whole town was astir over the incident" |
| ~ acrobatic, gymnastic, athletic | vigorously active.; "an acrobatic dance"; "an athletic child"; "athletic playing"; "gymnastic exercises" |
| ~ agile, nimble, spry, quick | moving quickly and lightly.; "sleek and agile as a gymnast"; "as nimble as a deer"; "nimble fingers"; "quick of foot"; "the old dog was so spry it was halfway up the stairs before we could stop it" |
| ~ hot | marked by excited activity.; "a hot week on the stock market" |
| ~ hyperactive, overactive | more active than normal.; "a hyperactive child" |
| ~ on the go | (of a person) very busy and active.; "is always on the go" |
| ~ sporty | appropriate for sport or engagement in a sport. |
| ~ lively | full of life and energy.; "a lively discussion"; "lively and attractive parents"; "a lively party" |
| ~ energetic | possessing or exerting or displaying energy.; "an energetic fund raiser for the college"; "an energetic group of hikers"; "it caused an energetic chemical reaction" |
| adj. | 9. active | exerting influence or producing a change or effect.; "an active ingredient" |
| ~ activated | rendered active; e.g. rendered radioactive or luminescent or photosensitive or conductive. |
| ~ counteractive | opposing or neutralizing or mitigating an effect by contrary action. |
| ~ surface-active | capable of lowering the surface tension of a liquid; used especially of detergents. |
| adj. | 10. active | full of activity or engaged in continuous activity.; "an active seaport"; "an active bond market"; "an active account" |
| ~ brisk | very active.; "doing a brisk business" |
| ~ bustling | full of energetic and noisy activity.; "a bustling city" |
| ~ busy | crowded with or characterized by much activity.; "a very busy week"; "a busy life"; "a busy street"; "a busy seaport" |
| ~ going | in full operation.; "a going concern" |
| ~ open | ready for business.; "the stores are open" |
| ~ springy | (of movements) light and confidently active.; "he walked away with a springy step" |
| adj. | 11. active, alive | in operation.; "keep hope alive"; "the tradition was still alive"; "an active tradition" |
| ~ existent, existing | having existence or being or actuality.; "an attempt to refine the existent machinery to make it more efficient"; "much of the beluga caviar existing in the world is found in the Soviet Union and Iran" |
| adj. | 12. active | (of the sun) characterized by an increased occurrence of sunspots and flares and radio emissions. |
| ~ astronomy, uranology | the branch of physics that studies celestial bodies and the universe as a whole. |
| adj. | 13. active | expressing that the subject of the sentence has the semantic function of actor:.; "Hemingway favors active constructions" |
| ~ grammar | the branch of linguistics that deals with syntax and morphology (and sometimes also deals with semantics). |
| adj. | 14. active, dynamic | (used of verbs (e.g. `to run') and participial adjectives (e.g. `running' in `running water')) expressing action rather than a state of being. |
| ~ grammar | the branch of linguistics that deals with syntax and morphology (and sometimes also deals with semantics). |
| adj. | 15. active | (of e.g. volcanos) capable of erupting. |
| ~ alive, live | capable of erupting.; "a live volcano"; "the volcano is very much alive" |
| ~ live | exerting force or containing energy.; "live coals"; "tossed a live cigarette out the window"; "got a shock from a live wire"; "live ore is unmined ore"; "a live bomb"; "a live ball is one in play" |
| adj. | 16. active | (of e.g. volcanos) erupting or liable to erupt.; "active volcanos" |
| ~ volcano, vent | a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt. |
| ~ eruptive | actively spewing out lava.; "a geyser is an intermittently eruptive hot spring" |
| adj. | 17. active | engaged in full-time work.; "active duty"; "though past retirement age he is still active in his profession" |
| ~ activated | (military) set up and placed on active assignment.; "a newly activated unit" |
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