noun

• The process or art of finding candidates for a post in an organization, or recruits for the armed forces.
• A style or process of recruiting.
• (biology, ecology) The addition of new adult or breeding-age individuals (recruits) to a population.
• (physiology) The full aeration of a lung.
• (medicine) Opening of collapsed lung alveoli by means of controlled increase in transpulmonary pressure using mechanical ventilation. (treatment strategy for ARDS)
• (medicine) A physical condition of the inner ear that leads to reduced tolerance of loudness, commonly occurring in those with hearing loss due to cochlear damage.