(uncountable) One of several sizes to which an item may be manufactured. / (countable) An item labelled or denoted as being that size. / (countable) One who fits an item of that size.

(especially clothing) That is extra small (the manufactured size). / Used other than figuratively or idiomatically: see extra, small.

Synonym of husband stitch / Used other than figuratively or idiomatically: see extra, stitch.

plural of extra stitch

Alternative spelling of extravehicular

(tennis) Describing a tennis ball having a thicker felt woven more loosely around the ball's core, designed for hard court surfaces such as asphalt or concrete.

(idiomatic) To make an extra effort; to do a particularly good job.

plural of extra base hit

(baseball) A double, triple, or home run.

(idiomatic) The assistance of another person.