Definition of weaks:
(adj) :
Lacking in force (usually strength) or ability.
(adj) :
Unable to sustain a great weight, pressure, or strain.
(adj) :
Unable to withstand temptation, urgency, persuasion, etc.; easily impressed, moved, or overcome; accessible; vulnerable.
(adj) :
Limp, soft.
(adj) :
Dilute, lacking in taste or potency.
(adj) :
(often with for) Having a strong, irrepressible emotional love for someone or (less often) something; sentimentally affected by such love.