...gainful activity. A person must not only be unable to do his or her previous work but cannot, considering age, education, and work experience, engage in any...gainful work which exists in the national economy. Before 1991, a stricter disability definition applied to disabled widow(er)s. A widow(er) needed to...

...from engaging in any substantial gainful activity. Such an Individual, however, shall be determined to be under a disability only if his physical or mental impairment or impairments are the primary reason for his inability to engage in substantial gainful activity. In any such case it...

...from engaging in any substantial gainful activity. Such an individual, however, shall be determined to be under a disability only if his physical or mental impairment or impairments are the primary reason for his inability to engage in substantial gainful activity. In any such case it...

...from engaging in any substantial gainful activity. Such an individual, however, shall be determined to be under a disability only if his physical or mental impairment or impairments are the primary reason for his inability to engage in substantial gainful activity. In any such case it...

...individual shall be determined to be under a disability only if his impairment or impairments are so severe that he is not only unable to do his previous work...economy, regardless of whether such work exists in the general area in which he lives, or whether a specific job vacancy exists, or whether he would be hired...

...individual shall be determined to be under a disability only if his impairment or impairments are so severe that he is not only unable to do his previous work...education, and work experience, engage in any other kind of sub stantial gainful work which exists in the national economy, regardless of whether such work exists...

...work or work commensurate with his previous work in amount of earnings and utilization of capacities but cannot, considering his age, education, and work...gainful work which exists in the national economy (§604), regardless of whether such work exists in the immediate area in which he lives, or whether...

...with the previous work in amount of earnings and utilization of capacities but cannot, considering age, education, and work experience, engage in any...gainful work which exists in the national economy (see § 610). It is immaterial whether such work exists in the immediate area, or whether a specific...

...disability must be so severe that the individual is unable to engage in any kind of substantial work that exists in the national economy, regardless of whether such work exists in the immediate area in which lie lives, whether a specific job vacancy exists for him, or whether he would be hired if he applied...

...phrasing of the standard to achieve this purpose is as follows: [A]n individual . . . shall be determined to be under a disability only if his physical or mental...work but cannot, considering his age, education, and previous work experience, engage in any kind of substantial gainful work which exists in the national...