(idiomatic) In one's opinion, from one's point of view.

(Ulster) An unpredictable person.

(calculus) a covector field

(slang, basketball) A basketball player who plays college basketball for a single year and then declares for the NBA draft.

(obsolete, nonce word) secret

(idiomatic, Northern England) Alone, on one's own.

Misspelling of one-sidedly.

plural of one and a half

One and a half parts of anything that may be divided, or considered as divided.

(idiomatic) Two people united by marriage.