have a lock on
Definition of have a lock on
: to be assured of (something) He appears to have a lock on the nomination for governor.
Word by Word Definitions
: a tuft, tress, or ringlet of hair
: the hair of the head
: a cohering bunch (as of wool, cotton, or flax) : tuft
: a fastening (as for a door) operated by a key or a combination
: the mechanism for exploding the charge or cartridge of a firearm
: an enclosure (as in a canal) with gates at each end used in raising or lowering boats as they pass from level to level
: to fasten the lock of
: to make fast with or as if with a lock
: to fasten in or out or to make secure or inaccessible by or as if by means of locks
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