Dictionary

To creep or go stealthily; to come or go while trying to avoid detection, as a person who does not wish to be seen.

Example: He decided to sneak into the kitchen for a second cookie while his mom was on the phone.

To take something stealthily without permission.

Example: I went to sneak a chocolate but my dad caught me.

(ditransitive) To stealthily bring someone something.

Example: She asked me to sneak her a phone next month.

To hide, especially in a mean or cowardly manner.

The act of one who sneaks.

Secret or underhand; not openly avowed.