IPA: /ˈsɪŋər/
KK: /ˈsɪŋər/
A person who sings, especially someone who performs music professionally or is trained in singing.
The singer captivated the audience with her beautiful voice.
Singer → It is formed from "sing" (from Old English "singan", meaning to make musical sounds with the voice) and "-er" (meaning a person who). A singer is a person who makes musical sounds with their voice.
Think of someone who 'makes musical sounds' ('sing') — the '-er' just means a person. A singer is someone who sings.