Verb (5-dan, る, intransitive)
Usually written in kana
1. to mount (a horse, bicycle, etc.); to straddle; to sit astride
ともあれ、再び二人で自転車にまたがり、走り出す。Be that as it may, the two of them mount their bicycles again and start riding.
2. to span (an area, time, etc.); to extend over; to spread over
その森は三つの国にまたがって広がっている。That forest stretches across three countries.