peaker

noun5

1. •
   That which reaches or forms a peak.

   • L of them, Tryfan is clearly a three peaker from this angle, and the Glyders with their two outliers (16) complete the circle. — 2016
2. •
   A power station used only for, or mostly for, peaking: providing energy supply only during peak usage periods.

   • The most common peaking units or "peakers" are electricity generating units that run during times of high electricity consumption. — 2000
3. •
   One whose behaviour or performance reaches a maximum (of something) at a particular time.

   • These are the teams the program team has to watch out for. They're the peakers. — 2004
4. •
   One who climbs to the peak of one or more mountains.

   • 'Good work, team, good work! ... We meet a long trail of Three Peakers doing their first mountain. — 2012
5. •
   One who is open to peak experiences.

   • Interestingly, in terms of his hierarchy of human potential, Maslow locates these 'peakers' between the self-actualizers who have peak experiences and those who do not. — 2001