1. a reminder note or file used to prompt action at a specific time
Usage: business
2. something that tickles or causes laughter
3. a difficult problem or puzzle
Usage: informal

Examples

• She kept a tickler file to remember important deadlines.
• The secretary used a tickler system to track follow-up calls.
• That joke was a real tickler at the party.
• The comedian’s routine was full of ticklers that had everyone laughing.
• This math problem is quite a tickler.
• The crossword puzzle proved to be a real tickler for the students.