1. (

• spine ,
• thorn ,
• prickle ,
• pricker ,
• sticker ,
• spikelet

) a small sharp-pointed tip resembling a spike on a stem or leaf ;

2. (

• gummed_label ,
• sticker ,
• paster

) an adhesive label ;

3. (

• poser ,
• stumper ,
• toughie ,
• sticker ,

) a particularly difficult or baffling question or problem ;

4. (

• dagger ,
• sticker

) a short knife with a pointed blade used for piercing or stabbing ;