active

(noun) chemical agent capable of activity. Synonyms: active agent.

(noun) the voice used to indicate that the grammatical subject of the verb is performing the action or causing the happening denoted by the verb. Synonyms: active voice. Example: "`the boy threw the ball' uses the active voice."

(noun) a person who is a participating member of an organization. Example: "The club issues a list of members, both the actives and the retirees."

(adj) tending to become more severe or wider in scope. Synonyms: active (vs. inactive). Example: "Active tuberculosis."

(adj) engaged in or ready for military or naval operations. Synonyms: combat-ready, fighting(prenominal). Examples: "On active duty." "The platoon is combat-ready." "Review the fighting forces."

(adj) disposed to take action or effectuate change. Synonyms: active (vs. passive). Examples: "A director who takes an active interest in corporate operations." "An active antagonism." "He was active in drawing attention to their grievances."

(adj) taking part in an activity. Synonyms: participating. Examples: "An active member of the club." "He was politically active." "The participating organizations."

(adj) characterized by energetic activity. Synonyms: active (vs. inactive). Examples: "An active toddler." "Active as a gazelle." "An active man is a man of action."

(adj) exerting influence or producing a change or effect. Synonyms: active (vs. inactive). Example: "An active ingredient."

(adj) full of activity or engaged in continuous activity. Synonyms: active (vs. inactive). Examples: "An active seaport." "An active bond market." "An active account."

(adj) in operation. Synonyms: alive(predicate). Examples: "Keep hope alive." "The tradition was still alive." "An active tradition."

(adj) (of the sun) characterized by an increased occurrence of sunspots and flares and radio emissions. Synonyms: active (vs. quiet).

(adj) expressing that the subject of the sentence has the semantic function of actor: "Hemingway favors active constructions". Synonyms: active (vs. passive).

(adj) (used of verbs (e.g. `to run') and participial adjectives (e.g. `running' in `running water')) expressing action rather than a state of being. Synonyms: active (vs. stative), dynamic.

(adj) (of e.g. volcanos) capable of erupting. Synonyms: active (vs. extinct).

(adj) (of e.g. volcanos) erupting or liable to erupt. Synonyms: active (vs. dormant). Example: "Active volcanos."

(adj) engaged in full-time work. Synonyms: active (vs. inactive). Examples: "Active duty." "Though past retirement age he is still active in his profession."