onetime (adj.), one-time (adj.), one time (phrase): When he stole one time, he was a one-time thief; since he made a habit of it, but has since quit, he is a onetime thief. (While many dictionaries accept “onetime” for “one-time,” that hyphen can be useful when wanting to emphasize the singularity of the event.)

Is one time a hyphenated word?

“Onetime” is an adjective, meaning former, as in “a onetime addict to Harry Potter.” “One time” (two separate words) is an adjective and a noun, meaning a single occasion, as in, “One time, I wore a purple sparkling cape because my bookstore employer dictated it on the night of a Harry Potter midnight release.”

Does one hour Need a hyphen?

1 Answer. Because you are making an adjective out of the words one and hour, you should hyphenate. The combination of one and hour modifies the word session.