|Origin:||buterfleoge, from butere ( BUTTER1) + fleoge 'fly'; perhaps because many types of butterfly are yellow, or because people believed that butterflies steal milk and butter|
but‧ter‧fly plural butterflies [countable]
a type of insect that has large wings, often with beautiful colours
to feel very nervous before doing something:
I always get butterflies before an exam.
a way of swimming by lying on your front and moving your arms together over your head while your legs move up and down
someone who usually moves on quickly from one activity or person to the next:
Gwen's a real social butterfly.