The difference between Ahead of and Before
When used as prepositions, ahead of means in front of, whereas before means earlier than (in time).
Before is also conjunction with the meaning: in advance of the time when.
Before is also adverb with the meaning: at an earlier time.
check bellow for the other definitions of Ahead of and Before
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Ahead of as a preposition:
In front of.
Examples:
"A hill loomed ahead of them."
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Ahead of as a preposition:
Preceding.
Examples:
"He's giving a series of concerts in London ahead of his international tour."
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Ahead of as a preposition:
In the future of.
Examples:
"You have a long trip ahead of you."
"Peter has a lot of work ahead of him."
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Ahead of as a preposition:
In advance of.
Examples:
"I arrived at the suite half an hour ahead of Jack."
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Ahead of as a preposition:
Having made more progress than.
Examples:
"He is far ahead of his class in math."
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Before as a preposition:
Earlier than (in time).
Examples:
"I want this done before Monday."
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Before as a preposition:
In front of in space.
Examples:
"He stood before me."
"We sat before the fire to warm ourselves."
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Before as a preposition:
In the presence of.
Examples:
"He performed before the troops in North Africa."
"He spoke before a joint session of Congress."
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Before as a preposition:
Under consideration, judgment, authority of (someone).
Examples:
"The case laid before the panel aroused nothing but ridicule."
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Before as a preposition:
In store for, in the future of (someone).
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Before as a preposition:
In front of, according to a formal system of ordering items.
Examples:
"In alphabetical order, "cat" comes before "dog", "canine" before feline"."
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Before as a preposition:
At a higher or greater position than, in a ranking.
Examples:
"An entrepreneur puts market share and profit before quality, an amateur intrinsic qualities before economical considerations."
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Before as an adverb:
At an earlier time.
Examples:
"I've never done this before."
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Before as an adverb:
In advance.
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Before as an adverb:
At the front end.