2.VerbTo gain, usually by one's own exertions; to get as one's own.
"to acquire a skill; to acquire decent habits and manners; He acquired a title.; All the riches he acquired were from hard work.; One should acquire as much knowledge as possible from reading."
3.VerbTo become affected by an illness.
4.VerbTo sample signals and convert them into digital values.
5.VerbTo begin tracking a mobile target with a particular detector or sight, generally with the implication that an attack on the target thereby becomes possible.