Synonym: animated, dynamic, energetic, lively, spirited, vivacious, working. Antonym: dormant, inactive, passive. Similar words: actively, attractive, active transport, activist, activity, detective, objective, perspective. Meaning: ['æktɪv] 
n. 1. chemical agent capable of activity 2. the voice used to indicate that the grammatical subject of the verb is performing the action or causing the happening denoted by the verb 3. a person devoted to the active life. adj. 1. tending to become more severe or wider in scope 2. engaged in or ready for military or naval operations 3. disposed to take action or effectuate change 4. taking part in an activity 5. characterized by energetic activity 6. exerting influence or producing a change or effect 7. full of activity or engaged in continuous activity 8. in operation 9. of the sun; characterized by a high level activity in sunspots and flares and radio emissions 10. expressing that the subject of the sentence has the semantic function of actor: "Hemingway favors active constructions" 11. expressing action rather than a state of being; used of verbs (e.g. `to run') and participial adjectives (e.g. `running' in `running water') 12. (of e.g. volcanos) capable of erupting 13. (of e.g. volcanos) erupting or liable to erupt 14. engaged in full-time work.
n. 1. chemical agent capable of activity 2. the voice used to indicate that the grammatical subject of the verb is performing the action or causing the happening denoted by the verb 3. a person devoted to the active life. adj. 1. tending to become more severe or wider in scope 2. engaged in or ready for military or naval operations 3. disposed to take action or effectuate change 4. taking part in an activity 5. characterized by energetic activity 6. exerting influence or producing a change or effect 7. full of activity or engaged in continuous activity 8. in operation 9. of the sun; characterized by a high level activity in sunspots and flares and radio emissions 10. expressing that the subject of the sentence has the semantic function of actor: "Hemingway favors active constructions" 11. expressing action rather than a state of being; used of verbs (e.g. `to run') and participial adjectives (e.g. `running' in `running water') 12. (of e.g. volcanos) capable of erupting 13. (of e.g. volcanos) erupting or liable to erupt 14. engaged in full-time work. 
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31. She takes an active part in school life.
32. He was very active in Freemasonry.
33. He has dropped out of active politics.
34. He enlisted for active service in the war.
35. He's very active considering he's in his seventies.
36. He's very active for an elderly man.
37. We're taking active steps to deal with the problem.
38. Acetic acid is the chief active ingredient in vinegar.
39. She took an active interest in their welfare.
40. Share prices were buoyant today in active trading.
41. They were both politically active.
42. She is very active for an octogenarian.
43. He became politically active at college.
44. Joe took an active part in the struggle.
45. More than 20,(sentencedict.com)000 women are on active duty.
46. She plays an active part in local politics.
47. We had better calculate on their active participation.
48. She is an active participant in this activity.
49. Guerrilla groups are active in the province.
50. What is the active ingredient in aspirin?
51. She's no less active than she used to be.
52. He is dominating and active in manner.
53. He has been an active participant in the discussion.
54. Try to be as physically active as possible.
55. The virus is active even at low temperatures.
56. We maintain active links with other European universities.
57. We have a very active sex life.
58. Old people cannot be so active as young people.
59. Encourage students to take an active part in discussions.
60. Yogurt is made from active cultures.
More similar words: actively, attractive, active transport, activist, activity, detective, objective, perspective, distinctive, protective, productive, collective, effectively, respectively, effectiveness, irrespective of, tactic, action, motive, native, fraction, practice, reaction, relative, incentive, practical, sensitive, supportive, executive, narrative.