Below is the definition for the word you requested, useful for Scrabble and other word games. To find more definitions please use the dictionary page.
being perceived or observed; "an easily noticed effect on the rate of growth"
make or write a comment on; "he commented the paper of his colleague"
express recognition of the presence or existence of, or acquaintance with; "He never acknowledges his colleagues when they run into him in the hallway"; "She acknowledged his complement with a smile"; "it is important to acknowledge the work of others in one's own writing"
notice or perceive; "She noted that someone was following her"; "mark my words"
discover or determine the existence, presence, or fact of; "She detected high levels of lead in her drinking water"; "We found traces of lead in the paint"