Tra từ runner - Từ điển Oxford Advanced Learner 8th

run·ner [runner runners] BrE [ˈrʌnə(r)] NAmE [ˈrʌnər] noun
1. a person or an animal that runs, especially one taking part in a race
•a long-distance/cross-country/marathon, etc. runner
•a list of runners (= horses in a race) and riders
see also ↑forerunner, ↑front runner, ↑roadrunner
2. (especially in compounds)a person who takes goods illegally into or out of a place
•a drug runner
see also ↑gunrunner
3. a strip of metal, plastic or wood that sth slides on or can move along on
•the runners of a sledge
4. a plant ↑stem that grows along the ground and puts down roots to form a new plant
5. a long narrow piece of cloth or carpet on a piece of furniture or on the floor
6. a person in a company or an organization whose job is to take messages, documents, etc. from one place to another
7. (CanE)a shoe that is used for running or doing other sport in
Idiom: ↑do a runner

Thesaurus:
runner noun C
•He's a keen marathon runner.
athlete • • player • |especially BrE sportsman/sportswoman •
a top/great/keen runner/athlete/player/sportsman/sportswoman
a/an average/good/world-class runner/athlete/player
a/an runner/athlete/player/sportsman/sportswoman trains/practises/competes

Example Bank:
•He is currently the front runner for the Democratic Party presidential nomination.
•one of the fancied runners in today's race
•He's also a keen marathon runner.
•Here is the list of runners and riders for the first race.
•She was a good runner and soon caught up with Tom.
•Some of the country's top long-distance runners are competing in this 10km race.
•There are several promising young 1500-metre runners coming through.
•a marathon/long-distance/1500-metre runner