The meaning of AFFECTION is a feeling of liking and caring for someone or something : tender attachment : fondness. How to use affection in a sentence. Affectation and Affection Synonym Discussion of Affection . The noun ' affection ' has its etymological roots in Latin. It is derived from the Latin word 'affectionem,' which is the past participle of 'afficere,' meaning 'to affect' or 'to influence.' In its original Latin sense, 'affectionem' referred to the act of being affected or influenced by something, often in an emotional or personal manner. Affection is a tender feeling toward another, a feeling or emotion, or a diseased condition. Find out the origin, usage, and translations of the word affection in different contexts and languages. Affection is the positive feeling you may have or express for other people or things. Your grandma may show her affection for you by pinching your cheek, and you may show your affection for your dog by rubbing her belly.