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observable

[ uhb-zur-vuh-buhl ]
/ əbˈzɜr və bəl /
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adjective

capable of being or liable to be observed; noticeable; visible; discernible: an observable change in attitude.
worthy or important enough to be celebrated, followed, or observed: an observable holiday.
deserving of attention; noteworthy.

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The rainy weather could not ________ my elated spirits on my graduation day.

Origin of observable

1600–10; <Latin observābilis remarkable, equivalent to observā(re) to observe + -bilis-ble
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Scientific definitions for observable

observable
[ əb-zûrvə-bəl ]

A measurable property of a physical system, such as mass or momentum. In quantum mechanics, observables correspond to mathematical operators used in the calculation of measurable quantities. Operators that do not commute, having a nonzero commutator, correspond to observables that cannot be precisely measured at the same time, such as momentum and position. See also uncertainty principle.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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