
1) Mentally sound 2) Of sound mind 3) Sane
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https://www.crosswordclues.com/clue/compos-mentis

1) Making a heap of sense
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https://www.crosswordclues.com/clue/compostmentis

• (n.) One who is compos mentis.
Found on
http://thinkexist.com/dictionary/meaning/compos-mentis/

• Sane in mind; being of sound mind, memory, and understanding.
Found on
http://thinkexist.com/dictionary/meaning/compos_mentis/

Of sound mind; usually used in its opposite form, non compos mentis. ... Origin: L. Possessed of one's mind; compos, having control, + mens(ment-), mind ... (05 Mar 2000) ...
Found on
http://www.encyclo.co.uk/local/20973

(kom´pәs men´tis) Latin word meaning sound of mind, sane.
Found on
http://www.encyclo.co.uk/local/21001

Latin term for of sound mind.It indicates a person who is legally of sound mind,memory,understanding and is capable of attending a trial.
Found on
http://www.encyclo.co.uk/local/21213
Com'pos men'tis [ Latin ]
(Law) Sane in mind; being of sound mind, memory, and understanding.
Found on
http://www.encyclo.co.uk/webster/C/123
Com'pos-men'tis noun One who is compos mentis. [ Colloq.]
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http://www.encyclo.co.uk/webster/C/123

Type: Term Pronunciation: kom′pos men′tis Definitions: 1. Of sound mind; usually used in its opposite form. See: non compos mentis
Found on
http://www.medilexicon.com/medicaldictionary.php?t=19511

(cahm-puhs men-tis) Latin for having a sound mind.
Found on
http://www.nolo.com/dictionary/compos-mentis-term.html

Compos mentis is Latin for of sound mind (sane)
Found on
http://www.probertencyclopaedia.com/Y.HTM

compos mentis 1. Of sound mind, memory, and understanding; sane. 2. In law, competent to go to trial. 3. If someone is compos mentis, he/she is able to think clearly and is responsible for her/his actions: 'My sister was quite old, when I last saw her, but she was definitely compos mentis.'
Found on
http://www.wordinfo.info/words/index/info/view_unit/1289/

in full possession of mental powers, sane (cf. non compos mentis)
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https://www.businessballs.com/glossaries-and-terminology/latin-terms-and-ph

Of sound mind Legally fit to conduct/defend proceedings
Found on
https://www.encyclo.co.uk/local/22448

sane; mentally sound.
Found on
https://www.infoplease.com/dictionary/compos-mentis
No exact match found.