first noun
1 (also first gear) lowest gear on a bicycle/vehicle
VERB + FIRST engage She engaged first gear and pulled off. | get into, move into, slam into As he moved into first the gear-lever knob came off in his hand. | put sth into Put the car into first and pull off slowly. | find It's very difficult to find first on this car.
PREP. in ~ There was something wrong with the gearbox and I had to drive all the way home in first.
2 highest level of university degree
ADJ. double She did Philosophy and English Literature and got a double first.
VERB + FIRST be awarded, gain, get, obtain
PREP. ~ in He got a first in modern history.
You can also check other dicts: first (English, 中文解释 ), wordnet sense, Collins Definition