happening or arising without apparent external cause; spontaneous laughter; spontaneous combustion; a spontaneous abortion
[ Syn: self-generated ]
said or done without having been planned or written in advance; he made a few ad-lib remarks
happening or arising without apparent external cause; spontaneous laughter; spontaneous combustion; a spontaneous abortion
[ Syn: self-generated ]
said or done without having been planned or written in advance; he made a few ad-lib remarks