Definition of als:
(adv) :
Obsolete form of also. [(conjunctive, focus) In addition; besides; as well; further; too.]
(n) :
(pathology, uncountable) Initialism of amyotrophic lateral sclerosis. [(neurology, pathology) A chronic, progressive disease characterized by degeneration of the central nervous system and the loss of voluntary muscle control.]
(n) :
(Philippines, education) Initialism of Alternative Learning System.
(n) :
(aviation, countable) Initialism of approach lighting system.
(n) :
(electronics, countable) Initialism of ambient light sensor.