Number of times a batter swings and misses on three pitches.

If a claim is "struck out" then it cannot be continued with. Parts of a claim can be struck out as can any written material.

put out or be put out by a strikeout; "Oral struck out three batters to close the inning"

be unsuccessful in an endeavor; "The candidate struck out with his health care plan"

cause to retire; "The pitcher retired three batters"; "the runner was put out at third base"

set out on a course of action; "He struck out on his own"

Getting all three possible strikes in the 10th frame.

Out recorded by recording three strikes on the batter.

Usually, getting all three strikes in the tenth frame; also sometimes the same as punch out.

When a batter swings and misses three pitchers, receives three pitches within the strike zone without swinging, or a combination of the two. The batter is declared out. Foul balls are counted as strikes, except for the third strike, which either must be a swing-and-a-miss or looking.