1. to board (a train, plane, etc.), to get into (a car), to get on (a bus), to go on board, to get aboard
2. to march into, to enter, to arrive (at, in)
1. indicates word or phrase being defined
2. used for quoting (thoughts, speech, etc.)
3. with
4. (not) as much as, (not) so much as
5. the fact that, to think that, such a thing as