Definition Of sly
having or showing a cunning and deceitful nature.
she had a sly personality
Example Of sly
A sly , mischievous grin then appeared on the thief's face.
a sly sip of water
At the Chelsea Flower Show, Ann-Marie Powell finds garden designers looking to a geometric future and enjoys japesters taking a sly dig at the past
‘Something for you to eat,’ replies the breakfast girl with a sly grin.
‘We may let in a few goals,’ he said with a sly grin.