Third-person singular simple present indicative form of lengthen.(verb)
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Use "lengthens" in a sentence
"As we travel northward we find the term lengthens; and in the Northern Agricultural"
"“However, as one extends that time horizon from one day to one month to one quarter to one year to 10 years, the probability of losing money decreases as the time horizon lengthens.”"
"The shadow, a horizontal shade drawing over the earth, lengthens."