Terms and Definitions
| active duty for training - A tour of active duty that is used for training members of the Reserve Component to provide trained units and qualified persons to fill the needs of the Armed Forces in time of war or national emergency and such other times as the national security requires. Also called ADT. | (SOURCE - DOD, DOD Dictionary, JP 4‐05) |
| active duty for training - (A) full-time duty in the Armed Forces performed by Reserves for training purposes; (B) full-time duty for training purposes performed as a commissioned officer of the Reserve Corps of the Public Health Service (i) on or after July 29, 1945, or (ii) before that date under circumstances affording entitlement to full military benefits, or (iii) at any time, for the purposes of chapter 13 of this title; (C) in the case of members of the Army National Guard or Air National Guard of any State, full-time duty under title 32, or the prior corresponding provisions of law; (D) duty performed by a member of a Senior Reserve Officers' Training Corps program when ordered to such duty for the purpose of training or a practice cruise under chapter 103 of title 10 for a period of not less than four weeks and which must be completed by the member before the member is commissioned; and (E) authorized travel to or from such duty. Does not include duty performed as a temporary member of the Coast Guard Reserve. | (SOURCE - DVA, US Code 38, §101.) |
| active duty service - Service in the armed forces of the United States performed on a full-time basis with military pay and allowances. Additionally, active duty military service means that all of an individual's time and efforts are at the disposal of military authorities; he or she disassociates himself or herself from the performance of civilian employment during the period of military service. | (SOURCE - DOS/ USAID, FAM, 3 FAM 6134.1) |
| Active Guard and Reserve - National Guard and Reserve members who are on voluntary active duty providing full-time support to National Guard, Reserve, and Active Component organizations for the purpose of organizing, administering, recruiting, instructing, or training the Reserve Components. | (SOURCE - DOD, DOD Dictionary, CJCSM 3150.13) |
| active infrared sensor - sensor that emits an infrared beam to a receiver forming an invisible link that, when broken, acts as a trigger to activate a device. | (SOURCE - DHS, DHS Lexicon, Terms) |
| active ingredient [pesticide] - substance (or group of structurally similar substances if specified by the Agency) that prevents, destroys, repels or mitigates any pest, or that functions as a plant regulator, desiccant, or defoliant within the meaning of FIFRA. | (SOURCE - DHS, DHS Lexicon, Terms) |
| active lock - electric locking device that holds a portal closed and cannot be opened for egress by normal operation of the door hardware magnetic locks. | (SOURCE - DHS, DHS Lexicon, Terms) |
| active military, naval, or air service - (A) active duty; (B) any period of active duty for training during which the individual concerned was disabled or died from a disease or injury incurred or aggravated in line of duty; and (C) any period of inactive duty training during which the individual concerned was disabled or died (i) from an injury incurred or aggravated in line of duty; or (ii) from an acute myocardial infarction, a cardiac arrest, or a cerebrovascular accident occurring during such training. | (SOURCE - DVA, US Code 38, §101.) |
| active participation in hostilities - a. Taking part in combat or military activities related to combat, including sabotage and serving as a decoy, a courier, or at a military checkpoint; or b. Taking part in direct support functions related to combat, including transporting supplies or providing other services. c. Active participants in hostilities may include (nonexhaustive) - (1) Combatants; (2) Porters; (3) Spies or informants; (4) Couriers; (5) Human mine detectors; or (6) Executioners. | (SOURCE - DOS/ USAID, FAM, 9 FAM 102.3‐1 (U)) |
| active sensor - detecting device that transmits some type of energy and detects a change in the received energy created by the presence of motion of the target. | (SOURCE - DHS, DHS Lexicon, Terms) |
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