Plural of caller; people who make telephone calls or visit someone. In square dancing, the person who announces the dance moves.
From call, from Old Norse kalla 'to cry loudly.' The -er suffix creates an agent noun. The square dancing sense developed in American folk culture, while telephone usage emerged with telecommunications.
Square dance callers are musical poets in real-time - they must simultaneously keep perfect rhythm, create rhyming cues that dancers can follow instantly, and read the skill level of the room, making them among the most mentally agile performers in folk traditions.
Complete word intelligence in one call. Free tier — 50 lookups/day.