Englishfor English speakers
catering
—
noun
providing food and services
sub
Noun
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Short for submarine.
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Short for submarine sandwich.
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Short for substitute.
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Short for subscription.
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Short for submissive.
sub
Verb
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To substitute for.
I subbed for an injured player during last night's game.
—
To work as a substitute teacher, especially in primary and secondary education.
Now that I've retired from my full-time teaching job, I'll do some subbing from time to time to keep busy and earn a little extra money.
Ms. Smith subs for Mr. Jones' math class when he's sick.
—
, To replace (a player) with a substitute.
He never really made a contribution to the match, so it was no surprise when he was subbed at half time.
unit
Noun
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One of a measure of something; the amount of something that is counted as "one".
Measure five units to the left.
$4 is the unit price.
A pound is a useful unit for thinking about amounts of butter.
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Form of measurement.
I prefer metric units.
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Item, used when no other word for something exists.
He set up the A/C unit.