(informal, Britain, Australia) Exactly at

(informal, Britain, Australia, usually derogatory) To constantly talk about something.

(baseball, of the ball) While in the air, without having touched the ground. / (idiomatic) Spontaneously or extemporaneously; done as one goes, or during another activity.

In earnest; sincerely; with one's full feeling.

(law, transitive) To make a decision in an official capacity regarding some matter.

a quantum well incorporated in a quantum dot

(transitive) To test the look or fit of (a garment) by wearing it. / (transitive, slang) To attempt; to undertake.

(idiomatic) Something that attracts, gives pleasure, or encourages, especially sexually.

(intransitive, idiomatic) To formalize an agreement.

To rely on a single source (as of income), rather than diversifying.