1 [uncountable] success in achieving something The attainment of his ambitions was still a dream. Bonus payments encourage the attainment of higher production targets.2 [countable] something that you [..]

late 14c., "encroachment" (a sense now obsolete), from Old French ataignement (Modern French atteignement), from ataindre; see attain. Meaning "action of attaining" is from 1540s; [..]

refers to a specific educational achievement or accomplishment. Also refers to the achievement of goals.

(n) the act of achieving an aim(n) arrival at a new stage(n) an ability that has been acquired by training

Meeting or exceeding NAAQS standards for criteria pollutants, including ozone, carbon monoxide, particulate matter, and nitrogen oxides. A region may be an attainment area for a given pollutant and a [..]

measured ability, level of achievement of a learner ( in some subject area or skill).

Reaching a particular level, accomplishing a goal. In vocational education and training, successful completion of the requirements of a module or course. See also Statement of Attainment.

For a region to be "in attainment," hourly measurements of air pollution in that region must not exceed those designated to be safe by the Federal Clean Air Act.

a designation used when an area meets an air quality standard

The level of achievement reached, often described in terms of the number and/or level of particular awards or qualifications

Area An area considered to have air quality as good as or better than the NAAQS as defined in the Clean Air Act. An area may be an attainment area for one pollutant and a non-attainment area for others.