WordNet sense 1 (the state of inactivity following an interruption):

arrest, halt, hitch, stay, stop, stoppage

WordNet sense 2 (a written order directing a bank to pay money):

cheque, bank check

WordNet sense 3 (a mark indicating that something has been noted or completed etc.):

tick, check mark

WordNet sense 4 (the bill in a restaurant):

chit, tab

WordNet sense 5 (additional proof that something that was believed (some fact or hypothesis or theory) is correct):

confirmation, substantiation, verification

WordNet sense 6 (an appraisal of the state of affairs):

assay

WordNet sense 7 (something immaterial that interferes with or delays action or progress):

balk, deterrent, handicap, hindrance, impediment, baulk, hinderance

WordNet sense 8 (a mark left after a small piece has been chopped or broken off of something):

chip

WordNet sense 9 (be verified or confirmed; pass inspection):

check out

WordNet sense 10 (be compatible, similar or consistent; coincide in their characteristics):

agree, correspond, fit, gibe, jibe, match, tally

WordNet sense 11 (train by instruction and practice; especially to teach self-control):

condition, discipline, train

WordNet sense 12 (lessen the intensity of; temper; hold in restraint; hold or keep within limits):

contain, control, curb, hold, moderate, moderate, hold in

WordNet sense 13 (mark into squares or draw squares on; draw crossed lines on):

checker, chequer

WordNet sense 14 (the act of restraining power or action or limiting excess):

bridle

WordNet sense 15 (hold back, as of a danger or an enemy; check the expansion or influence of):

turn back, hold back

WordNet sense 16 (find out, learn, or determine with certainty, usually by making an inquiry or other effort):

ascertain, determine, learn, see, watch, find out

WordNet sense 17 (be careful or certain to do something; make certain of something):

assure, ensure, insure, see to it

WordNet sense 18 (put a check mark on or near or next to):

mark, mark off, tick off

WordNet sense 19 (examine so as to determine accuracy, quality, or condition):

go over, check into, check over, check up on, suss out, look into

WordNet sense 20 (slow the growth or development of):

delay

WordNet sense 21 (become fractured; break or crack on the surface only):

break, crack

WordNet sense 22 (the act of inspecting or verifying):

checkout, check-out procedure