EXTENSION [ik-sten-shuhn] What it is: Any artificial product that creates an extension of the fingernail. VIDEOS RELATED TO THIS TERM LEARN MORE TERMSSOAK-OFF GEL POLISHEPONYCHIUMDIP NAILSHYPONYCHIUMCURING LAMPMIXED MEDIAACRYLATEVERTICAL OMBRENAIL POLISHIMPLEMENTSACIDACRYLIC NAILSSTICKERSFRENCH MANICUREACRYLIC BRUSHSANITIZERALLERGICSQUARE NAILGLOVESCOVER PINK POWDER PrevNext