(skateboarding, snowboarding, skiing, BMX, rollerskating, kickscootering, etc.) A structure used to perform tricks, approximately semicircular in cross-section, resembling the bottom half of a cylinder laying down.

The moon in its first or last quarter when only half the visible face is illuminated; a quarter moon. / Anything shaped like a crescent, especially the base of a fingernail. / A type of cookie

(cricket) A ball bowled so as to pitch roughly half way down the wicket, ie. half-way between batsman and bowler. (From a slow bowler this is a poor delivery, likely to be hit to the boundary.)

A person, especially a child, with only one living parent.

Alternative form of halfhearted

A rate of pay 50% greater than normal, commonly used for overtime work.

A short coat or jacket. / A short bullet jacket which leaves some of the bullet in contact with the bore.

(wrestling) A hold in which the wrestler applying the hold puts one arm under the arm of their opponent and applies pressure to the back of their opponents head or neck.

Alternative spelling of second half

(idiomatic, litotes) Pretty good, imperfect but more than OK.