bore out
C1 neutral separable transitive
In simple words
To make a hole bigger or more precise using a special drilling machine.
Literal meaning: To use a boring tool outward — to increase the diameter of an existing cylindrical space.
Meanings
1 C1 neutral
(Engineering) To enlarge or precisely shape the interior of a cylindrical hole using a boring tool.
"The mechanic had to bore out the engine cylinders to fit the larger pistons."
Grammar: separable
Usage notes
Primarily a technical engineering or mechanical term. Refers to the process of enlarging or finishing the interior of a cylindrical hole to exact dimensions using a boring bar or lathe. Common in automotive contexts (boring out an engine cylinder). Not related to the sense of causing boredom.
Commonly used with
cylinder engine hole barrel lathe block
Forms
Base
bore out
I/you/we/they
3rd person
bores out
he/she/it
Past simple
bored out
yesterday
Past participle
bored out
have + pp
-ing form
boring out
continuous
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