1) Already occupied 2) Already taken 3) Bathroom sign 4) Bathroom stall sign 5) Being employed 6) Being operated 7) Being put to service 8) Being utilized 9) Busy 10) Busy terminuses contain this 11) Currently employed 12) Currently occupied 13) Currently operating 14) Currently unavailable 15) Currently working Found on https://www.crosswordclues.com/clue/inuse
A member of the vitamin B complex necessary for growth of yeast and of mice, absence from the diet causes hair loss and dermatitis in mice. ... (27 Sep 1997) ... Found on http://www.encyclo.co.uk/local/20973