(fiction) The main setting of J.R.R. Tolkien's Lord of the Rings and other works. / Alternative form of Middle Earth: the Earth.

The middle of the week. / (Christianity, Latter-Day Saints, Jehovah's Witnesses, informal) Midweek worship service, held by many congregations and in addition to a Sunday morning service.

That happens in the middle of the week

In the middle of the week.

The middle of winter. / The winter solstice; about December 21st or 22nd.

The period around the summer solstice; about 21st June in the northern hemisphere. / The first day of summer / The middle of summer. / Midsummer Day, the English quarter day.

Happening in the middle of summer.

A name between the first given name and the family name or surname; a second or subsequent given name. / (figuratively) A trait, activity, or action closely associated with or aptly describing a person.

noon; twelve o'clock during the day

(cricket) A fielding position on the leg side, about 30° forward of square and near the boundary; a fielder in that position.