Rehabilitation Services. Orthopaedics & Sports Medicine Owensboro (OSMO) is the premier provider of orthopaedic and rehabilitation services in northwest Kentucky. We offer a multi-disciplinary approach to rehab that includes a treatment plan tailored to meet the unique needs of each patient.
Definition of ageâgrade. 1  1 : a group of persons of the same sex and approximately the same age having certain definite duties and privileges in common and constituting a division of a tribe or society. 2  2 : a stage (as boyhood, adolescence, or manhood) through which an age-grade passes.
4th Grade redirects here. For the South Park episode, see 4th Grade (South Park). Fourth Grade (also called Grade Four or Year five in Britain) is a term used to refer to a year of elementary education in some countries. In North America, the fourth grade is the fifth school year of elementary school. Students are usually 9â10 years old, depending on their birthday.