An unexpected, bizarre, or unwatched source (especially in the phrases out of left field and from left field)
Some of her comments really came from left field. I have no idea what she was thinking.
An unusual or unexpected position, or a viewpoint held by very few others in contrast to the majority viewpoint (especially in the phrases out in left field and way out in left field)
The part of a baseball field which is beyond the infield and to your left if you stand on home plate and face the pitcher
Left-field means slightly odd or unusual. a left-field cabaret act Her parents were creative and left-field and wanted Polly to become a singer or a truck driver. = unconventional
If you say that someone or something has come out of left field or is out in left field, you mean that they are untypical, unusual, or strange in some way. The question came out of left field, but Mary Ann wasn't really surprised He is, like most theorists, out there in left field, ignoring the experimental evidence
the fielding position of the player on a baseball team who is expected to field balls in the left third of the outfield (looking from home plate) the piece of ground in the outfield on the catcher's left
the fielding position of the player on a baseball team who is expected to field balls in the left third of the outfield (looking from home plate)