1
: specification
—usually used in plural
also
: a single quantity (such as a dimension or a measure of performance) describing a product especially as part of a specification
2
: speculation
built the house on spec
Examples of spec in a Sentence
Noun
parts built according to spec
Recent Examples on the Web
PCMAG, 20 Mar. 2025
Product specs Best Bags: Stasher Starter Pack Stasher Stasher
Stasher
Starter Pack
$100
Stasher
Pros
Sturdy seal
Very durable
Microwave-, oven-, and freezer-safe
Cons
More larger sizes would be helpful
Tired: Disposable, single-use plastic bags.
—Jessica Kasparian, SELF, 20 Mar. 2025
Rob Reed, Forbes, 11 Mar. 2025
There are too many freelancers who just look at whether their output is to spec.
—Expert Panel®, Forbes, 18 Feb. 2025
See All Example Sentences for spec
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Noun
For wired connections, Apple carries over the same USB 3 spec from last year's M2 iPad Air.
—PCMAG, 20 Mar. 2025
Product specs Best Bags: Stasher Starter Pack Stasher Stasher
Stasher
Starter Pack
$100
Stasher
Pros
Sturdy seal
Very durable
Microwave-, oven-, and freezer-safe
Cons
More larger sizes would be helpful
Tired: Disposable, single-use plastic bags.
—Jessica Kasparian, SELF, 20 Mar. 2025
Verb
The former offers a more supple ride from the butting along with being built to spec.
—Rob Reed, Forbes, 11 Mar. 2025
There are too many freelancers who just look at whether their output is to spec.
—Expert Panel®, Forbes, 18 Feb. 2025
See All Example Sentences for spec
Cite this Entry
“Spec.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spec. Accessed 1 Apr. 2025.
Copy CitationLegal Definition
spec
transitive verbˈspek
specced or spec'd
ˈspekt 
; speccing
; speccing
ˈspe-kiŋ
: to write specifications for
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