I like to have a good grasp of kanji/vocab/radicals visually (knowing meaning by sight) and mentally (understanding the story, readings, etc through mnemonics) before I move on.
But as I am near the end of level 4, I’ve run into a character that I can’t quite understand 100%. 一文字
一文字 is defined as a “straight line.” I’ve searched the meaning and tried to find it being used in sentences and came to a website which used not only 一文字 but 二文字 as well. It was an article for understanding the meaning of 海’s なのり in boy/girl names. Said site that you DO NOT have to read (though it’s amazing practice for those who want it) http://babyrina.jp/pregnancy/give-a-name-umi.html
I’m wondering if/when does it mean “straight line” or “one letter/character.” Or even if it means both, just in different circumstances? I’m just unsure and would love for it to be cleared up for me…