One Time Around
Once Around
noun, verbal noun
One circumference is one time around. How many times will you go around the moon? Just 一周?
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well. Note that the いち becomes いっ as it often does when being used in a counter (一階, 一回, etc.).
一周をする
to go around once
一周を回る
to go around once
一周を走る
to run around once
あのランナーは、最後の一周で十位から一位になった。
That runner went from tenth place to first place in the final lap.
コウイチはグラウンド一周を三分台で走ります。
Koichi can run one lap of the track in three to four minutes.
来年は家族で世界一周旅行に出かけるんです。
Next year, my family is going on a trip around the world.