The difference between Footer and Idle
When used as nouns, footer means a footgoer, whereas idle means an idle animation.
When used as verbs, footer means to meddle with or pass time without accomplishing anything meaningful, whereas idle means to spend in idleness.
Idle is also adjective with the meaning: empty, vacant.
check bellow for the other definitions of Footer and Idle
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Footer as a noun (archaic):
A footgoer; pedestrian
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Footer as a noun (computing):
A line of information printed at the bottom of a page as identification of the document (compare foot, 12).
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Footer as a noun (in combination):
something that is a stated number of feet in some dimension - such as a six-footer.
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Footer as a noun (in combination):
someone who has a preference for a certain foot - such as right-footer/left-footer
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Footer as a noun (chiefly, British, slang):
Football / soccer.
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Footer as a verb (Ireland, &, Scotland, slang):
To meddle with or pass time without accomplishing anything meaningful.
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Idle as an adjective (obsolete):
Empty, vacant.
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Idle as an adjective:
Not being used appropriately; not occupied; (of time) with no, no important, or not much activity.
Examples:
"'idle hours"
"'[[idle time]] (compare: [[downtime]])"
"My computer [[hibernate]]s after it has been idle for 30 minutes."
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Idle as an adjective:
Not engaged in any occupation or employment; unemployed; inactive; doing nothing in particular.
Examples:
"'idle workmen"
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Idle as an adjective:
Averse to work, labor or employment; lazy; slothful.
Examples:
"an idle fellow"
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Idle as an adjective:
Of no importance; useless; worthless; vain; trifling; thoughtless; silly.
Examples:
"an idle story;  idle talk;  idle rumor"
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Idle as an adjective (obsolete):
Light-headed; foolish.
Examples:
"rfquotek Ford"
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Idle as a verb (transitive):
To spend in idleness; to waste; to consume.
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Idle as a verb (intransitive):
To lose or spend time doing nothing, or without being employed in business.
Examples:
"to idle in an [[IRC]] channel"
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Idle as a verb (intransitive):
Of an engine: to run at a slow speed, or out of gear; to tick over.
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Idle as a noun (gaming):
An idle animation.
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Idle as a noun (gaming):
An idle game.
Examples:
"synonyms: idle game incremental game"