|1.||a. weak in health or body, esp from old age|
|b. (as collective noun; preceded by the): the infirm|
|2.||lacking moral certainty; indecisive or irresolute|
|3.||not stable, sound, or secure: an infirm structure; an infirm claim|
|4.||law (of a law, custom, etc) lacking legal force; invalid|
infirm in·firm (ĭn-fûrm')
Weak in body, especially from old age or disease; feeble.