Theoretical vs. Practical

Theoretical and Practical Definitions
Theoretical
Of, relating to, or based on theory.
Practical
Of, relating to, governed by, or acquired through practice or action, rather than theory or speculation
Gained practical experience of sailing as a deck hand.
Theoretical
Restricted to theory; not practical or applied
Theoretical physics.
Practical
Manifested in or involving practice
Practical applications of calculus.
Theoretical
Studying or working to develop theory.
Practical
Capable of or suitable to being used or put into effect; useful
Practical knowledge of Japanese. See Usage Note at practicable.
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Theoretical
Of or relating to theory; abstract; not empirical.
Practical
Concerned with the production or operation of something useful
Woodworking is a practical art.
Theoretical
Concerned primarily with theories or hypotheses rather than practical considerations;
Theoretical science
Practical
Having or showing good judgment; sensible
If we're practical, we can do the job quickly.
Theoretical
Concerned with theories rather than their practical applications;
Theoretical physics
Practical
Being actually so in almost every respect; virtual
The snowstorm was a practical disaster.
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Theoretical
Based on specialized theory;
A theoretical analysis
Practical
Relating to, or based on, practice or action rather than theory or hypothesis.
Jack didn't get an engineering degree, but has practical knowledge of metalworking.
Modern engineering applies science to practical problems.
Practical
Being likely to be effective and applicable to a real situation; able to be put to use
Jack's knowledge has the practical benefit of giving us useful prototype parts.
Practical
Of a person, having skills or knowledge that are practical
All in all, Jack's a very practical chap.
Practical
Of a prop: having some degree of functionality, rather than being a mere imitation.
Practical
(film) Light fixtures used for set lighting and seen in the frame of a shot as part of the scenery.
Practical lighting can help sell the illusion that the film is a real situation.
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Practical
(British) A part of an exam or series of exams in which the candidate has to demonstrate their practical ability
Practical
(theater) A prop that has some degree of functionality, rather than being a mere imitation.
Practical
(film) A light fixture used for set lighting and seen in the frame of a shot as part of the scenery.
Practical
Laboratory experiment, test or investigation
Practical
Of or pertaining to practice or action.
Practical
Capable of being turned to use or account; useful, in distinction from ideal or theoretical; as, practical chemistry.
Practical
Evincing practice or skill; capable of applying knowledge to some useful end; as, a practical man; a practical mind.
Practical
Derived from practice; as, practical skill.
Practical
Concerned with actual use or practice;
He is a very practical person
The idea had no practical application
A practical knowledge of Japanese
Woodworking is a practical art
Practical
Guided by practical experience and observation rather than theory;
A hardheaded appraisal of our position
A hard-nosed labor leader
Completely practical in his approach to business
Not ideology but pragmatic politics
Practical
Being actually such in almost every respect;
A practical failure
The once elegant temple lay in virtual ruin
Practical
Having or put to a practical purpose or use;
Practical mathematics
Practical applications of calculus