Does ‘Υιοτηεσια (huiothesia) really mean ‘adoption’ in Galatians 4:5?

In Galatians 4:5 and 6, we read : To redeem them that were under the law, that we might receive the adoption of sons. And because ye are sons, God hath sent forth the Spirit of his Son into your hearts, crying, Abba, Father. [KJV.] ‘…